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Introduction XML digital signatures, canonicalization, and encryption were standardized by the W3C and by the joint IETF/W3C XMLDSIG working group . These are now W3C Recommendations and some are also RFCs. They are available as follows: RFC
Status W3C REC Topic
Draft Standard XML Digital Signatures
Informational Canonical XML - - - - - - XML Encryption 1.0
Informational Exclusive XML Canonicalization 1.0 These documents and recommendations use URIs to identify algorithms and keying information types. The W3C has subsequently produced updated XML Signature 1.1 , Canonical XML 1.1 , and XML Encryption 1.1 versions, as well as a new XML Signature Properties specification . In addition, the XML Encryption recommendation has been augmented by , which defines algorithms, XML types, and elements necessary to use generic hybrid ciphers in XML security applications. also provides for a key encapsulation algorithm and a data encapsulation algorithm, with the combination of the two forming the generic hybrid cipher. All camel-case element names (names with both interior upper and lower case letters) herein, such as DigestValue, are from these documents. This document is an updated convenient reference list of URIs and corresponding algorithms in which there is expressed interest. This document fixes Errata , , and , and obsoletes . All of the URIs for algorithms and data types herein are listed in the indexes in . Of these URIs, those that were added by earlier RFCs or by this document have a subsection in Section or . A few URIs defined elsewhere also have a subsection in Section or , but most such URIs do not. For example, use of SHA-256 as defined in has no subsection here but is included in the indexes in . Specification in this document of the URI representing an algorithm does not imply endorsement of the algorithm for any particular purpose. A protocol specification, which this is not, generally gives algorithm and implementation requirements for the protocol. Security considerations for algorithms are constantly evolving, as documented elsewhere. This specification simply provides some URIs and relevant formatting when those URIs are used. This document is not intended to change the algorithm implementation requirements of any IETF or W3C document. Use of terminology from and is intended to be only such as is already stated or implied by other authoritative documents. Progressing XML Digital Signature along the Standards Track required removal of any algorithms from the original version for which there was not demonstrated interoperability. This required removal of the Minimal Canonicalization algorithm, in which there was continued interest. The URI for Minimal Canonicalization was included in and is included here. Terminology The key words " MUST ", " MUST NOT ", " REQUIRED ", " SHALL ", " SHALL NOT ", " SHOULD ", " SHOULD NOT ", " RECOMMENDED ", " NOT RECOMMENDED ", " MAY ", and " OPTIONAL " in this document are to be interpreted as described in BCP 14 when, and only when, they appear in all capitals, as shown here. "camel-case" refers to terms that are mostly lower case but have internal capital letters. Acronyms The following acronyms are used in this document:

AAD -: Additional Authenticated Data
AEAD -: Authenticated Encryption with Associated Data
ASN.1 -: Abstract Syntax Notation 1
BER -: Basic Encoding Rules
DSA -: Digital Signature Algorithm
DSS -: Digital Signature Standard
ECDSA -: Elliptic Curve DSA
HMAC -: Hashed Message Authentication Code
IETF -: Internet Engineering Task Force
MAC -: Message Authentication Code
MD -: Message Digest
NIST -: United States National Institute of Standards and Technology
OID -: Object Identifier
PKCS -: Public Key Cryptography Standard
RSA -: Rivest, Shamir, and Adleman
SHA -: Secure Hash Algorithm
URI -: Uniform Resource Identifier
W3C -: World Wide Web Consortium
XML -: eXtensible Markup Language

Algorithms The URI that was dropped from the XML Digital Signature standard due to the transition from Proposed Standard to Draft Standard is included in with its original prefix so as to avoid changing the XMLDSIG standard's namespace. Additional algorithms in RFC 4051 were given URIs that start with Further algorithms added in were given URIs that start with and algorithms added in this document are given URIs that start with In addition, for ease of reference, this document includes in the indexes in many cryptographic algorithm URIs from XML security documents using the namespaces with which they are defined in those documents as follows: for some URIs specified in , for some URIs specified in , and for some URIs specified in . See also . DigestMethod (Hash) Algorithms These algorithms are usable wherever a DigestMethod element occurs. MD5 Identifier: http://www.w3.org/2001/04/xmldsig-more#md5 The MD5 algorithm takes no explicit parameters. An example of an MD5 DigestAlgorithm element is: <DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#md5"/> An MD5 digest is a 128-bit string. The content of the DigestValue element SHALL be the base64 encoding of this bit string viewed as a 16-octet stream. See for MD5 security considerations. SHA-224 Identifier: http://www.w3.org/2001/04/xmldsig-more#sha224 The SHA-224 algorithm takes no explicit parameters. An example of a SHA-224 DigestAlgorithm element is: <DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha224" /> A SHA-224 digest is a 224-bit string. The content of the DigestValue element SHALL be the base64 encoding of this string viewed as a 28-octet stream. SHA-384 Identifier: http://www.w3.org/2001/04/xmldsig-more#sha384 The SHA-384 algorithm takes no explicit parameters. An example of a SHA-384 DigestAlgorithm element is: <DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha384" /> A SHA-384 digest is a 384-bit string. The content of the DigestValue element SHALL be the base64 encoding of this string viewed as a 48-octet stream. Whirlpool Identifier: http://www.w3.org/2007/05/xmldsig-more#whirlpool The Whirlpool algorithm takes no explicit parameters. An example of a Whirlpool DigestAlgorithm element is: <DigestAlgorithm Algorithm="http://www.w3.org/2007/05/xmldsig-more#whirlpool" /> A Whirlpool digest is a 512-bit string. The content of the DigestValue element SHALL be the base64 encoding of this string viewed as a 64-octet stream. SHA-3 Algorithms Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224 http://www.w3.org/2007/05/xmldsig-more#sha3-256 http://www.w3.org/2007/05/xmldsig-more#sha3-384 http://www.w3.org/2007/05/xmldsig-more#sha3-512 NIST conducted a hash function competition for an alternative to the SHA family. The Keccak-f[1600] algorithm was selected . This hash function is commonly referred to as "SHA-3" . A SHA-3 224, 256, 384, and 512 digest is a 224-, 256-, 384-, and 512-bit string, respectively. The content of the DigestValue element SHALL be the base64 encoding of this string viewed as a 28-, 32-, 48-, and 64-octet stream, respectively. An example of a SHA3-224 DigestAlgorithm element is: <DigestAlgorithm Algorithm="http://www.w3.org/2007/05/xmldsig-more#sha3-224" /> SignatureMethod MAC Algorithms This section covers SignatureMethod Message Authentication Code (MAC) Algorithms. Note: Some text in this section is duplicated from for the convenience of the reader. is normative in case of conflict. HMAC-MD5 Identifier: http://www.w3.org/2001/04/xmldsig-more#hmac-md5 The HMAC algorithm takes the truncation length in bits as a parameter; if the parameter is not specified, then all the bits of the hash are output. An example of an HMAC-MD5 SignatureMethod element is as follows: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-md5"> <HMACOutputLength>112</HMACOutputLength> </SignatureMethod> The output of the HMAC algorithm is the output (possibly truncated) of the chosen digest algorithm. This value SHALL be base64 encoded in the same straightforward fashion as the output of the digest algorithms. Example: the SignatureValue element for the HMAC-MD5 digest 9294727A 3638BB1C 13F48EF8 158BFC9D from the test vectors in would be kpRyejY4uxwT9I74FYv8nQ== Schema Definition: <simpleType name="HMACOutputLength"> <restriction base="integer"/> </simpleType> DTD: <!ELEMENT HMACOutputLength (#PCDATA) > The Schema Definition and DTD immediately above are copied from . See for HMAC-MD5 security considerations. HMAC SHA Variations Identifiers: http://www.w3.org/2001/04/xmldsig-more#hmac-sha224 http://www.w3.org/2001/04/xmldsig-more#hmac-sha256 http://www.w3.org/2001/04/xmldsig-more#hmac-sha384 http://www.w3.org/2001/04/xmldsig-more#hmac-sha512 SHA-224, SHA-256, SHA-384, and SHA-512 can also be used in HMAC as described in for HMAC-MD5. HMAC-RIPEMD160 Identifier: http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160 RIPEMD-160 is a 160-bit hash that is used here in HMAC. The output can be optionally truncated. An example is as follows: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160"> <HMACOutputLength>144</HMACOutputLength> </SignatureMethod> Poly1305 Identifier: http://www.w3.org/2021/04/xmldsig-more#poly1305 Poly1305 is a high-speed message authentication code algorithm. It takes a 32-octet one-time key and a message and produces a 16-octet tag, which is used to authenticate the message. An example of a Poly1305 SignatureMethod element is as follows: <SignatureMethod Algorithm="http://www.w3.org/2021/04/xmldsig-more#poly1305"/> SipHash-2-4 Identifier: http://www.w3.org/2021/04/xmldsig-more#siphash-2-4 SipHash computes a 64-bit MAC from a 128-bit secret key and a variable-length message. An example of a SipHash-2-4 SignatureMethod element is as follows: <SignatureMethod Algorithm="http://www.w3.org/2021/04/xmldsig-more#siphash-2-4"/> XMSS and XMSSMT XMSS (eXtended Merkle Signature Scheme) and XMSSMT (XMSS Multi-Tree) are stateful hash-based signature schemes . According to NIST, it is believed that the security of these schemes depends only on the security of the underlying hash functions, in particular the infeasibility of finding a preimage or a second preimage, and it is believed that the security of these hash functions will not be broken by the development of large-scale quantum computers. For further information on the intended usage of these signature schemes and the careful state management required to maintain their strength, see . IANA maintains a registry whose entries correspond to the XMSS Identifiers below (see ). The fragment part of the URIs is formed by replacing occurrences of underscore ("_") in the name appearing in the IANA registry with hyphen ("-"). Identifiers for XMSS: http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-512 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-512 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-10-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-16-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-20-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-20-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-10-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-16-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-20-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-20-256 The hash functions used in the XMSS signature schemes above are SHA2 or one of the two SHAKE extensible output functions as indicated by the second token of the URI extension (SHAKE means SHAKE128). The tree height for XMSS is 10, 16, or 20 as indicated by the third token of the URI extension. The SHA2 or SHAKE output size is 192, 256, or 512 bits as indicated by the final token of the URI extension. SHA2 with 192 bits of output means SHA2-256/192, that is, the most significant 192 bits of the SHA-256 hash as specified in . IANA maintains a registry whose entries correspond to the XMSSMT Identifiers below (see ). The fragment part of the URIs is formed by replacing occurrences of underscore ("_") and slash ("/") in the name appearing in the IANA registry with hyphen ("-"). Identifiers for XMSSMT: http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-8-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-8-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-3-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-3-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-6-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-6-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-12-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-12-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-8-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-8-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-3-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-3-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-6-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-6-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-12-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-12-256 The hash functions used in the XMSSMT signature schemes above are SHA2 or one of the two the SHAKE extensible output function as indicated by the second token of the URI extension (SHAKE means SHAKE128). The tree height for XMSSMT is 20, 40, or 60 as indicated by the third token of the URI extension. The number of layers is indicated by a fourth token. The SHA2, SHAKE, or SHAKE256 output size is 192, 256, or 512 bits as indicated by the final token of the URI extension. SHA2 with 192 bits of output means SHA2-256/192, that is, the most significant 192 bits of the SHA-256 hash as specified in . An example of an XMSS SignatureAlgorithm element is: <SignatureAlgorithm Algorithm="http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-192" /> SignatureMethod Public Key Signature Algorithms These algorithms are distinguished from those in in that they use public key methods. That is to say, the signing key is different from and not feasibly derivable from the verification key. RSA-MD5 Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-md5 This implies the PKCS #1 v1.5 padding algorithm described in . An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-md5" /> The SignatureValue content for an RSA-MD5 signature is the base64 encoding of the octet string computed as per , signature generation for the RSASSA-PKCS1-v1_5 signature scheme. As specified in the EMSA-PKCS1-V1_5-ENCODE function in , the value input to the signature function MUST contain a prepended algorithm object identifier for the hash function, but the availability of an ASN.1 parser and recognition of OIDs is not required of a signature verifier. The PKCS #1 v1.5 representation appears as: CRYPT (PAD (ASN.1 (OID, DIGEST (data)))) The padded ASN.1 will be of the following form: 01 | FF* | 00 | prefix | hash The vertical bar ("|") represents concatenation. "01", "FF", and "00" are fixed octets of the corresponding hexadecimal value, and the asterisk ("*") after "FF" indicates repetition. "hash" is the MD5 digest of the data. "prefix" is the ASN.1 BER MD5 algorithm designator prefix required in PKCS #1 , that is, hex 30 20 30 0c 06 08 2a 86 48 86 f7 0d 02 05 05 00 04 10 This prefix is included to make it easier to use standard cryptographic libraries. The FF octet MUST be repeated enough times that the value of the quantity being CRYPTed is exactly one octet shorter than the RSA modulus. See for MD5 security considerations. RSA-SHA256 Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha256 This implies the PKCS #1 v1.5 padding algorithm as described in but with the ASN.1 BER SHA-256 algorithm designator prefix. An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" /> RSA-SHA384 Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha384 This implies the PKCS #1 v1.5 padding algorithm as described in but with the ASN.1 BER SHA-384 algorithm designator prefix. An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha384" /> Because it takes about the same effort to calculate a SHA-384 message digest as it does a SHA-512 message digest, it is suggested that RSA- SHA512 be used in preference to RSA-SHA384 where possible. RSA-SHA512 Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha512 This implies the PKCS #1 v1.5 padding algorithm as described in but with the ASN.1 BER SHA-512 algorithm designator prefix. An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha512" /> RSA-RIPEMD160 Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160 This implies the PKCS #1 v1.5 padding algorithm as described in but with the ASN.1 BER RIPEMD160 algorithm designator prefix. An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160" /> ECDSA-SHA*, ECDSA-RIPEMD160, ECDSA-Whirlpool Identifiers: http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha224 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha384 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha512 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-224 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-256 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-384 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-512 http://www.w3.org/2007/05/xmldsig-more#ecdsa-ripemd160 http://www.w3.org/2007/05/xmldsig-more#ecdsa-whirlpool The Elliptic Curve Digital Signature Algorithm (ECDSA) is the elliptic curve analogue of the Digital Signature Algorithm (DSA) signature method, i.e., the Digital Signature Standard (DSS). It takes no explicit parameters. For some detailed specifications of how to use it with SHA hash functions and XML Digital Signature, please see and . The #sha3-*, #ecdsa-ripemd160, and #ecdsa-whirlpool fragments identify signature methods processed in the same way as specified by the #ecdsa-sha1 fragment, with the exception that a SHA3 function (see ), RIPEMD160, or Whirlpool (see ) is used instead of SHA-1. The output of the ECDSA algorithm consists of a pair of integers usually referred to as the pair (r, s). The signature value consists of the base64 encoding of the concatenation of two octet streams that respectively result from the octet encoding of the values r and s in that order. Conversion from integer to octet stream must be done according to the I2OSP operation defined in the specification with the l parameter equal to the size of the base point order of the curve in octets (e.g., 32 for the P-256 curve and 66 for the P-521 curve ). For an introduction to elliptic curve cryptographic algorithms, see and note the errata (Errata IDs 2773-2777). ESIGN-SHA* Identifiers: http://www.w3.org/2001/04/xmldsig-more#esign-sha1 http://www.w3.org/2001/04/xmldsig-more#esign-sha224 http://www.w3.org/2001/04/xmldsig-more#esign-sha256 http://www.w3.org/2001/04/xmldsig-more#esign-sha384 http://www.w3.org/2001/04/xmldsig-more#esign-sha512 The ESIGN algorithm specified in is a signature scheme based on the integer factorization problem. An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#esign-sha1" /> RSA-Whirlpool Identifier: http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool As in the definition of the RSA-SHA1 algorithm in , the designator "RSA" means the RSASSA-PKCS1-v1_5 algorithm as defined in . When identified through the #rsa-whirlpool fragment identifier, Whirlpool is used as the hash algorithm instead. Use of the ASN.1 BER Whirlpool algorithm designator is implied. That designator is: hex 30 4e 30 0a 06 06 28 cf 06 03 00 37 05 00 04 40 as an explicit octet sequence. This corresponds to OID 1.0.10118.3.0.55 defined in . An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool" /> RSASSA-PSS with Parameters Identifiers: http://www.w3.org/2007/05/xmldsig-more#rsa-pss http://www.w3.org/2007/05/xmldsig-more#MGF1 These identifiers use the PKCS #1 EMSA-PSS encoding algorithm . The RSASSA-PSS algorithm takes the digest method (hash function), a mask generation function, the salt length in octets (SaltLength), and the trailer field as explicit parameters. Algorithm identifiers for hash functions specified in XML encryption , , and in are considered to be valid algorithm identifiers for hash functions. According to , the default value for the digest function is SHA-1, but due to the discovered weakness of SHA-1 , it is recommended that SHA-256 or a stronger hash function be used. Notwithstanding , SHA-256 is the default to be used with these SignatureMethod identifiers if no hash function has been specified. The default salt length for these SignatureMethod identifiers, if the SaltLength is not specified, SHALL be the number of octets in the hash value of the digest method as recommended in . In a parameterized RSASSA-PSS signature, the ds:DigestMethod and the SaltLength parameters usually appear. If they do not, the defaults make this equivalent to (see ). The TrailerField defaults to 1 (0xBC) when omitted. Schema Definition (target namespace ): <xs:element name="RSAPSSParams" type="pss:RSAPSSParamsType"> <xs:annotation> <xs:documentation> Top level element that can be used in xs:any namespace="#other" wildcard of ds:SignatureMethod content. </xs:documentation> </xs:annotation> </xs:element> <xs:complexType name="RSAPSSParamsType"> <xs:sequence> <xs:element ref="ds:DigestMethod" minOccurs="0"/> <xs:element name="MaskGenerationFunction" type="pss:MaskGenerationFunctionType" minOccurs="0"/> <xs:element name="SaltLength" type="xs:int" minOccurs="0"/> <xs:element name="TrailerField" type="xs:int" minOccurs="0"/> </xs:sequence> </xs:complexType> <xs:complexType name="MaskGenerationFunctionType"> <xs:sequence> <xs:element ref="ds:DigestMethod" minOccurs="0"/> </xs:sequence> <xs:attribute name="Algorithm" type="xs:anyURI" default="http://www.w3.org/2007/05/xmldsig-more#MGF1"/> </xs:complexType> RSASSA-PSS without Parameters currently specifies only one mask generation function MGF1 based on a hash function. Although allows for parameterization, the default is to use the same hash function as the digest method function. Only this default approach is supported by this section; therefore, the definition of a mask generation function type is not needed yet. The same applies to the trailer field. There is only one value (0xBC) specified in . Hence, this default parameter must be used for signature generation. The default salt length is the length of the hash function. Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-512-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#md2-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#md5-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha1-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha512-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#ripemd128-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#ripemd160-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#whirlpool-rsa-MGF1 An example of use is: <SignatureMethod Algorithm= "http://www.w3.org/2007/05/xmldsig-more#SHA3-256-rsa-MGF1" /> RSA-SHA224 Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha224 This implies the PKCS #1 v1.5 padding algorithm as described in but with the ASN.1 BER SHA-224 algorithm designator prefix. An example of use is: <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha224" /> Because it takes about the same effort to calculate a SHA-224 message digest as it does a SHA-256 message digest, it is suggested that RSA-SHA256 be used in preference to RSA-SHA224 where possible. See also concerning an erroneous version of this URI that appeared in . Edwards-Curve The Edwards-curve Digital Signature Algorithm (EdDSA) is a variant of Schnorr's signature system with Edwards curves. A specification is provided and some advantages listed in . The general EdDSA takes 11 parameters that must be carefully chosen for secure and efficient operation. Identifiers for two variants, Ed25519 and Ed448, are given below. Ed25519 uses 32-octet public keys and produces 64-octet signatures. It provides about 128 bits of security and uses SHA-512 internally as part of signature generation. Ed448 uses 57-octet public keys and produces 114-octet signatures. It provides about 224 bits of security and uses "SHAKE256" internally as part of signature generation. (SHAKE256 is specified by NIST as an "Extensible Output Function" and not specified or approved by NIST as a secure hash function.) For further information on the variants of EdDSA identified below, see . Identifiers: http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519ph http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519ctx http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519 http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448 http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448ph An example of use is: <SignatureMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448" /> Minimal Canonicalization Thus far, two independent interoperable implementations of Minimal Canonicalization have not been announced. Therefore, when "XML-Signature Syntax and Processing" was advanced along the Standards Track from to , Minimal Canonicalization was dropped. However, there was still interest. For its definition, see . For reference, its identifier remains: http://www.w3.org/2000/09/xmldsig#minimal Transform Algorithms The XPointer Transform algorithm syntax is described below. All CanonicalizationMethod algorithms can also be used as Transform algorithms. XPointer Identifier: http://www.w3.org/2001/04/xmldsig-more#xptr This transform algorithm takes an as an explicit parameter. An example of use is: <Transform Algorithm="http://www.w3.org/2001/04/xmldsig-more/xptr"> <XPointer xmlns="http://www.w3.org/2001/04/xmldsig-more/xptr"> xpointer(id("foo")) xmlns(bar=http://foobar.example) xpointer(//bar:Zab[@Id="foo"]) </XPointer> </Transform> Schema Definition: <element name="XPointer" type="string"/> DTD: <!ELEMENT XPointer (#PCDATA) > Input to this transform is an octet stream (which is then parsed into XML). Output from this transform is a node set; the results of the XPointer are processed as defined in the XMLDSIG specification for a same-document XPointer. EncryptionMethod Algorithms This subsection gives identifiers and information for several EncryptionMethod Algorithms. ARCFOUR Encryption Algorithm Identifier: http://www.w3.org/2001/04/xmldsig-more#arcfour ARCFOUR is a fast, simple stream encryption algorithm that is compatible with RSA Security's RC4 algorithm (Rivest Cipher 4); however, RC4 has been found to have a number of weaknesses and its use is prohibited in several IETF protocols, for example TLS . An example EncryptionMethod element using ARCFOUR is: <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#arcfour"> <KeySize>40</KeySize> </EncryptionMethod> ARCFOUR makes use of the generic KeySize parameter specified and defined in . Camellia Block Encryption Identifiers: http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc http://www.w3.org/2001/04/xmldsig-more#camellia192-cbc http://www.w3.org/2001/04/xmldsig-more#camellia256-cbc Camellia is a block cipher with the same interface as the AES ; it has a 128-bit block size and 128-, 192-, and 256-bit key sizes. In XML Encryption, Camellia is used in the same way as the AES: It is used in the Cipher Block Chaining (CBC) mode with a 128-bit initialization vector (IV). The resulting cipher text is prefixed by the IV. If included in XML output, it is then base64 encoded. An example Camellia EncryptionMethod is as follows: <EncryptionMethod Algorithm= "http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc" /> Camellia Key Wrap Identifiers: http://www.w3.org/2001/04/xmldsig-more#kw-camellia128 http://www.w3.org/2001/04/xmldsig-more#kw-camellia192 http://www.w3.org/2001/04/xmldsig-more#kw-camellia256 Camellia key wrap is identical to the AES key wrap algorithm specified in the XML Encryption standard with "AES" replaced by "Camellia". As with AES key wrap, the check value is 0xA6A6A6A6A6A6A6A6. The algorithm is the same regardless of the size of the Camellia key used in wrapping, called the "key encrypting key" or "KEK". If Camellia is supported, it is particularly suggested that wrapping 128-bit keys with a 128-bit KEK and wrapping 256-bit keys with a 256-bit KEK be supported. An example of use is: <EncryptionMethod Algorithm= "http://www.w3.org/2001/04/xmldsig-more#kw-camellia128" /> PSEC-KEM, RSAES-KEM, and ECIES-KEM Identifiers: http://www.w3.org/2001/04/xmldsig-more#psec-kem http://www.w3.org/2010/xmlsec-ghc#rsaes-kem http://www.w3.org/2010/xmlsec-ghc#ecies-kem These algorithms, specified in , are key encapsulation mechanisms using elliptic curve or RSA encryption. RSAEA-KEM and ECIES-KEM are also specified in . An example of use of PSEC-KEM is: <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#psec-kem"> <ECParameters> <Version>version</Version> <FieldID>id</FieldID> <Curve>curve</Curve> <Base>base</Base> <Order>order</Order> <Cofactor>cofactor</Cofactor> </ECParameters> </EncryptionMethod> See for information on the parameters above. SEED Block Encryption Identifier: http://www.w3.org/2007/05/xmldsig-more#seed128-cbc SEED is a block cipher with a 128-bit block size and 128-bit key size. In XML Encryption, SEED can be used in the Cipher Block Chaining (CBC) mode with a 128-bit initialization vector (IV). The resulting cipher text is prefixed by the IV. If included in XML output, it is then base64 encoded. An example SEED EncryptionMethod is as follows: <EncryptionMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#seed128-cbc" /> SEED Key Wrap Identifier: http://www.w3.org/2007/05/xmldsig-more#kw-seed128 Key wrapping with SEED is identical to with "AES" replaced by "SEED". The algorithm is specified in . The implementation of SEED is optional. The default initial value is 0xA6A6A6A6A6A6A6A6. An example of use is: <EncryptionMethod Algorithm= "http://www.w3.org/2007/05/xmldsig-more#kw-seed128" /> ChaCha20 Identifier: http://www.w3.org/2021/04/xmldsig-more#chacha20 ChaCha20 , a stream cipher, is a variant of Salsa20 . It is considerably faster than AES in software-only implementations. In addition to a 256-bit key and the plain text to be encrypted, ChaCha20 takes a 96-bit Nonce and an initial 32-bit Counter. The Nonce and Counter are represented as hex in nested elements as shown below. An example of use is: <EncryptionMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#chacha20"> <Nonce>0123456789abcdef01234567</Nonce> <Counter>fedcba09</Counter> </EncryptionMethod> ChaCha20+Poly1305 Identifier: http://www.w3.org/2021/04/xmldsig-more#chacha20poly1305 ChaCha20+Poly1305 is an Authenticated Encryption with Associated Data (AEAD) algorithm. In addition to a 256-bit key and plain text to be encrypted and authenticated, ChaCha20+Poly1305 takes a 96-bit Nonce and variable-length Additional Authenticated Data (AAD). The Nonce is represented as a child element of the EncryptionMethod element with a hex value. The AAD is a string, which may be null. The AAD element may be absent, in which case the AAD is null. The CipherData, either present in the CipherValue or by reference, is the concatenation of the encrypted ChaCha20 output and the Poly1305 128-bit tag. An example of use is: <EncryptionMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#chacha20poly1305"> <Nonce>0123456789abcdef01234567</Nonce> <AAD>The quick brown fox jumps over the lazy dog.</AAD> </EncryptionMethod> Key AgreementMethod Algorithm This subsection gives identifiers and information for an additional key AgreementMethod Algorithm . X25519 and X448 Key Agreement Identifier: http://www.w3.org/2021/04/xmldsig-more#x25519 http://www.w3.org/2021/04/xmldsig-more#x448 The X25519 and X448 key agreement algorithms are specified in . KeyDerivationMethod Algorithm This subsection gives identifiers and information for an additional KeyDerivationMethod Algorithm . HKDF Key Derivation This section covers the HMAC-based Extract-and-Expand Key Derivation Function (HKDF ). Identifier: http://www.w3.org/2021/04/xmldsig-more#hkdf HKDF takes as inputs a hash function, an optional non-secret "salt", initial keying material (IKM), optional context and application-specific "info", and the required output keying size. Note that these strictly determine the output so, for example, invoking HKDF at different times but with the same salt, info, initial keying material, and output key size will produce identical output keying material. The inputs can be supplied to HKDF as follows:

hash function:: The algorithm attribute of a child DigestMethod element.
salt:: The content of a Salt child element of AgreementMethod in hex. If not provided, a string of zero octets as long as the hash function output is used as specified in .
IKM:: The content of an OriginatorKeyInfo child element of AgreementMethod in hex. May be absent in some applications where this is known through some other method.
info:: The content of the KA-Nonce child element of AgreementMethod in hex.
size:: The content of a KeySize child element of AgreementMethod as a decimal number.

Here is the test case from as an example: <AgreementMethod algorithm="http://www.w3.org/2021/04/xmldsig-more#hkdf"> <DigestMethod algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/> <Salt>000102030405060708090a0b0c</Salt> <OriginatorKeyInfo>0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b </OriginatorKeyInfo> <KA-Nonce>f0f1f2f3f4f5f6f7f8f9</KA-Nonce> <KeySize>42</KeySize> </AgreementMethod> KeyInfo In , a KeyInfo element child is specified, while in , additional KeyInfo Type values for use in RetrievalMethod are specified. PKCS #7 Bag of Certificates and CRLs A PKCS #7 "signedData" can also be used as a bag of certificates and/or certificate revocation lists (CRLs). The PKCS7signedData element is defined to accommodate such structures within KeyInfo. The binary PKCS #7 structure is base64 encoded. Any signer information present is ignored. The following is an example , eliding the base64 data: <foo:PKCS7signedData xmlns:foo="http://www.w3.org/2001/04/xmldsig-more"> ... </foo:PKCS7signedData> Additional RetrievalMethod Type Values The Type attribute of RetrievalMethod is an optional identifier for the type of data to be retrieved. The result of dereferencing a RetrievalMethod reference for all KeyInfo types with an XML structure is an XML element or document with that element as the root. The various "raw" key information types return a binary value. Thus, they require a Type attribute because they are not unambiguously parsable. Identifiers: http://www.w3.org/2001/04/xmldsig-more#KeyName http://www.w3.org/2001/04/xmldsig-more#KeyValue http://www.w3.org/2001/04/xmldsig-more#PKCS7signedData http://www.w3.org/2001/04/xmldsig-more#rawPGPKeyPacket http://www.w3.org/2001/04/xmldsig-more#rawPKCS7signedData http://www.w3.org/2001/04/xmldsig-more#rawSPKISexp http://www.w3.org/2001/04/xmldsig-more#rawX509CRL http://www.w3.org/2001/04/xmldsig-more#RetrievalMethod Indexes The following subsections provide an index by URI and by fragment identifier (the portion of the URI after "#") of the algorithm and KeyInfo URIs defined in this document and in the standards plus the one KeyInfo child element name defined in this document. The "Sec/Doc" column has the section of this document or, if not specified in this document, the standards document where the item is specified. See also . Index by Fragment Index The initial "http://www.w3.org/" part of the URI is not included below. The first six entries have a null fragment identifier or no fragment identifier. "{Bad}" indicates a bad value that was accidentally included in . Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI. See also . Fragment URI Sec/Doc --------- ---- -------- 2002/06/xmldsig-filter2 [XPATH] 2006/12/xmlc12n11# {Bad} [CANON11] 2006/12/xmlc14n11# [CANON11] TR/1999/REC-xslt-19991116 [XSLT] TR/1999/REC-xpath-19991116 [XPATH] TR/2001/06/xml-exc-c14n# [XCANON] TR/2001/REC-xml-c14n-20010315 [CANON10] TR/2001/REC-xmlschema-1-20010502 [SCHEMA] aes128-cbc 2001/04/xmlenc#aes128-cbc [XMLENC11] aes128-gcm 2009/xmlenc11#aes128-gcm [XMLENC11] aes192-cbc 2001/04/xmlenc#aes192-cbc [XMLENC11] aes192-gcm 2009/xmlenc11#aes192-gcm [XMLENC11] aes256-cbc 2001/04/xmlenc#aes256-cbc [XMLENC11] aes256-gcm 2009/xmlenc11#aes256-gcm [XMLENC11] arcfour 2001/04/xmldsig-more#arcfour 2.6.1 base64 2000/09/xmldsig#base64 [RFC3275] camellia128-cbc 2001/04/xmldsig-more#camellia128-cbc 2.6.2 camellia192-cbc 2001/04/xmldsig-more#camellia192-cbc 2.6.2 camellia256-cbc 2001/04/xmldsig-more#camellia256-cbc 2.6.2 chacha20 2021/04/xmldsig-more#chacha20 2.6.7 chacha20poly1305 2021/04/xmldsig-more#chacha20poly1305 2.6.8 ConcatKDF 2009/xmlenc11#ConcatKDF [XMLENC11] decrypt#XML 2002/07/decrypt#XML [DECRYPT] decrypt#Binary 2002/07/decrypt#Binary [DECRYPT] DEREncodedKeyValue 2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11] dh 2001/04/xmlenc#dh [XMLENC11] dh-es 2009/xmlenc11#dh-es [XMLENC11] dsa-sha1 2000/09/xmldsig#dsa-sha1 [RFC3275] dsa-sha256 2009/xmldsig11#dsa-sha256 [XMLDSIG11] DSAKeyValue 2000/09/xmldsig#DSAKeyValue [XMLDSIG11] ECDH-ES 2009/xmlenc11#ECDH-ES [XMLENC11] ecdsa-ripemd160 2007/05/xmldsig-more#ecdsa-ripemd160 2.3.6 ecdsa-sha1 2001/04/xmldsig-more#ecdsa-sha1 2.3.6 ecdsa-sha224 2001/04/xmldsig-more#ecdsa-sha224 2.3.6 ecdsa-sha256 2001/04/xmldsig-more#ecdsa-sha256 2.3.6 ecdsa-sha384 2001/04/xmldsig-more#ecdsa-sha384 2.3.6 ecdsa-sha512 2001/04/xmldsig-more#ecdsa-sha512 2.3.6 ecdsa-sha3-224 2021/04/xmldsig-more#ecdsa-sha3-224 2.3.6 ecdsa-sha3-256 2021/04/xmldsig-more#ecdsa-sha3-256 2.3.6 ecdsa-sha3-384 2021/04/xmldsig-more#ecdsa-sha3-384 2.3.6 ecdsa-sha3-512 2021/04/xmldsig-more#ecdsa-sha3-512 2.3.6 ecdsa-whirlpool 2007/05/xmldsig-more#ecdsa-whirlpool 2.3.5 ecies-kem 2010/xmlsec-ghc#ecies-kem [GENERIC] ECKeyValue 2009/xmldsig11#ECKeyValue [XMLDSIG11] eddsa-ed25519 2021/04/xmldsig-more#eddsa-ed25519 2.3.12 eddsa-ed25519ctx 2021/04/xmldsig-more#eddsa-ed25519ctx 2.3.12 eddsa-ed25519ph 2021/04/xmldsig-more#eddsa-ed25519ph 2.3.12 eddsa-ed448 2021/04/xmldsig-more#eddsa-ed448 2.3.12 eddsa-ed448ph 2021/04/xmldsig-more#eddsa-ed448ph 2.3.12 enveloped-signature 2000/09/xmldsig#enveloped-signature [RFC3275] esign-sha1 2001/04/xmldsig-more#esign-sha1 2.3.7 esign-sha224 2001/04/xmldsig-more#esign-sha224 2.3.7 esign-sha256 2001/04/xmldsig-more#esign-sha256 2.3.7 esign-sha384 2001/04/xmldsig-more#esign-sha384 2.3.7 esign-sha512 2001/04/xmldsig-more#esign-sha512 2.3.7 generic-hybrid 2010/xmlsec-ghc#generic-hybrid [GENERIC] hkdf 2021/04/xmldsig-more#hkdf 2.8.1 hmac-md5 2001/04/xmldsig-more#hmac-md5 2.2.1 hmac-ripemd160 2001/04/xmldsig-more#hmac-ripemd160 2.2.3 hmac-sha1 2000/09/xmldsig#hmac-sha1 [RFC3275] hmac-sha224 2001/04/xmldsig-more#hmac-sha224 2.2.2 hmac-sha256 2001/04/xmldsig-more#hmac-sha256 2.2.2 hmac-sha384 2001/04/xmldsig-more#hmac-sha384 2.2.2 hmac-sha512 2001/04/xmldsig-more#hmac-sha512 2.2.2 KeyName 2001/04/xmldsig-more#KeyName 3.2 KeyValue 2001/04/xmldsig-more#KeyValue 3.2 kw-aes128 2001/04/xmlenc#kw-aes128 [XMLENC11] kw-aes128-pad 2009/xmlenc11#kw-aes-128-pad [XMLENC11] kw-aes192 2001/04/xmlenc#kw-aes192 [XMLENC11] kw-aes192-pad 2009/xmlenc11#kw-aes-192-pad [XMLENC11] kw-aes256 2001/04/xmlenc#kw-aes256 [XMLENC11] kw-aes256-pad 2009/xmlenc11#kw-aes-256-pad [XMLENC11] kw-camellia128 2001/04/xmldsig-more#kw-camellia128 2.6.3 kw-camellia192 2001/04/xmldsig-more#kw-camellia192 2.6.3 kw-camellia256 2001/04/xmldsig-more#kw-camellia256 2.6.3 kw-seed128 2007/05/xmldsig-more#kw-seed128 2.6.6 md2-rsa-MGF1 2007/05/xmldsig-more#md2-rsa-MGF1 2.3.10 md5 2001/04/xmldsig-more#md5 2.1.1 md5-rsa-MGF1 2007/05/xmldsig-more#md5-rsa-MGF1 2.3.10 MGF1 2007/05/xmldsig-more#MGF1 2.3.9 mgf1sha1 2009/xmlenc11#mgf1sha1 [XMLENC11] mgf1sha224 2009/xmlenc11#mgf1sha224 [XMLENC11] mgf1sha256 2009/xmlenc11#mgf1sha256 [XMLENC11] mgf1sha384 2009/xmlenc11#mgf1sha384 [XMLENC11] mgf1sha512 2009/xmlenc11#mgf1sha512 [XMLENC11] MgmtData 2000/09/xmldsig#MgmtData [XMLDSIG11] minimal 2000/09/xmldsig#minimal 2.4 pbkdf2 2009/xmlenc11#pbkdf2 [XMLENC11] PGPData 2000/09/xmldsig#PGPData [XMLDSIG11] PKCS7signedData 2001/04/xmldsig-more#PKCS7signedData 3.1 PKCS7signedData 2001/04/xmldsig-more#PKCS7signedData 3.2 poly1305 2021/04/xmldsig-more#poly1305 2.2.4 psec-kem 2001/04/xmldsig-more#psec-kem 2.6.4 rawPGPKeyPacket 2001/04/xmldsig-more#rawPGPKeyPacket 3.2 rawPKCS7signedData 2001/04/xmldsig-more#rawPKCS7signedData 3.2 rawSPKISexp 2001/04/xmldsig-more#rawSPKISexp 3.2 rawX509Certificate 2000/09/xmldsig#rawX509Certificate [RFC3275] rawX509CRL 2001/04/xmldsig-more#rawX509CRL 3.2 RetrievalMethod 2001/04/xmldsig-more#RetrievalMethod 3.2 ripemd128-rsa-MGF1 2007/05/xmldsig-more#ripemd128-rsa-MGF1 2.3.10 ripemd160 2001/04/xmlenc#ripemd160 [XMLENC11] ripemd160-rsa-MGF1 2007/05/xmldsig-more#ripemd160-rsa-MGF1 2.3.10 rsa-1_5 2001/04/xmlenc#rsa-1_5 [XMLENC11] rsa-md5 2001/04/xmldsig-more#rsa-md5 2.3.1 rsa-oaep 2009/xmlenc11#rsa-oaep [XMLENC11] rsa-oaep-mgf1p 2001/04/xmlenc#rsa-oaep-mgf1p [XMLENC11] rsa-pss 2007/05/xmldsig-more#rsa-pss 2.3.9 rsa-ripemd160 2001/04/xmldsig-more#rsa-ripemd160 2.3.5 rsa-sha1 2000/09/xmldsig#rsa-sha1 [RFC3275] rsa-sha224 2007/05/xmldsig-more#rsa-sha224 {Bad} 2.3.11 rsa-sha224 2001/04/xmldsig-more#rsa-sha224 2.3.11 rsa-sha256 2001/04/xmldsig-more#rsa-sha256 2.3.2 rsa-sha384 2001/04/xmldsig-more#rsa-sha384 2.3.3 rsa-sha512 2001/04/xmldsig-more#rsa-sha512 2.3.4 rsa-whirlpool 2007/05/xmldsig-more#rsa-whirlpool 2.3.5 rsaes-kem 2010/xmlsec-ghc#rsaes-kem [GENERIC] RSAKeyValue 2000/09/xmldsig#RSAKeyValue [XMLDSIG11] seed128-cbc 2007/05/xmldsig-more#seed128-cbc 2.6.5 sha1 2000/09/xmldsig#sha1 [RFC3275] sha1-rsa-MGF1 2007/05/xmldsig-more#sha1-rsa-MGF1 2.3.10 sha224 2001/04/xmldsig-more#sha224 2.1.2 sha224-rsa-MGF1 2007/05/xmldsig-more#sha224-rsa-MGF1 2.3.10 sha256 2001/04/xmlenc#sha256 [XMLENC11] sha256-rsa-MGF1 2007/05/xmldsig-more#sha256-rsa-MGF1 2.3.10 sha3-224 2007/05/xmldsig-more#sha3-224 2.1.5 sha3-224-rsa-MGF1 2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10 sha3-256 2007/05/xmldsig-more#sha3-256 2.1.5 sha3-256-rsa-MGF1 2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10 sha3-384 2007/05/xmldsig-more#sha3-384 2.1.5 sha3-384-rsa-MGF1 2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10 sha3-512 2007/05/xmldsig-more#sha3-512 2.1.5 sha3-512-rsa-MGF1 2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10 sha384 2001/04/xmldsig-more#sha384 2.1.3 sha384-rsa-MGF1 2007/05/xmldsig-more#sha384-rsa-MGF1 2.3.10 sha512 2001/04/xmlenc#sha512 [XMLENC11] sha512-rsa-MGF1 2007/05/xmldsig-more#sha512-rsa-MGF1 2.3.10 siphash-2-4 2021/04/xmldsig-more#siphash-2-4 2.2.5 SPKIData 2000/09/xmldsig#SPKIData [XMLDSIG11] tripledes-cbc 2001/04/xmlenc#tripledes-cbc [XMLENC11] whirlpool 2007/05/xmldsig-more#whirlpool 2.1.4 whirlpool-rsa-MGF1 2007/05/xmldsig-more#whirlpool-rsa-MGF1 2.3.10 WithComments 2006/12/xmlc14n11#WithComments [CANON11] WithComments TR/2001/06/xml-exc-c14n#WithComments [XCANON] WithComments TR/2001/REC-xml-c14n-20010315#WithComments [CANON10] x25519 2021/04/xmldsig-more#x25519 2.7.1 x448 2021/04/xmldsig-more#x448 2.7.1 X509Data 2000/09/xmldsig#X509Data [XMLDSIG11] xmss-sha2-10-192 2021/04/xmldsig-more#xmss-sha2-10-192 2.2.6 xmss-sha2-10-256 2021/04/xmldsig-more#xmss-sha2-10-256 2.2.6 xmss-sha2-10-512 2021/04/xmldsig-more#xmss-sha2-10-512 2.2.6 xmss-sha2-16-192 2021/04/xmldsig-more#xmss-sha2-16-192 2.2.6 xmss-sha2-16-256 2021/04/xmldsig-more#xmss-sha2-16-256 2.2.6 xmss-sha2-16-512 2021/04/xmldsig-more#xmss-sha2-16-512 2.2.6 xmss-sha2-20-192 2021/04/xmldsig-more#xmss-sha2-20-192 2.2.6 xmss-sha2-20-256 2021/04/xmldsig-more#xmss-sha2-20-256 2.2.6 xmss-sha2-20-512 2021/04/xmldsig-more#xmss-sha2-20-512 2.2.6 xmss-shake-10-256 2021/04/xmldsig-more#xmss-shake-10-256 2.2.6 xmss-shake-10-512 2021/04/xmldsig-more#xmss-shake-10-512 2.2.6 xmss-shake-16-256 2021/04/xmldsig-more#xmss-shake-16-256 2.2.6 xmss-shake-16-512 2021/04/xmldsig-more#xmss-shake-16-512 2.2.6 xmss-shake-20-256 2021/04/xmldsig-more#xmss-shake-20-256 2.2.6 xmss-shake-20-512 2021/04/xmldsig-more#xmss-shake-20-512 2.2.6 xmss-shake256-10-192 2021/04/xmldsig-more#xmss-shake256-10-192 2.2.6 xmss-shake256-10-256 2021/04/xmldsig-more#xmss-shake256-10-256 2.2.6 xmss-shake256-16-192 2021/04/xmldsig-more#xmss-shake256-16-192 2.2.6 xmss-shake256-16-256 2021/04/xmldsig-more#xmss-shake256-16-256 2.2.6 xmss-shake256-20-192 2021/04/xmldsig-more#xmss-shake256-20-192 2.2.6 xmss-shake256-20-256 2021/04/xmldsig-more#xmss-shake256-20-256 2.2.6 xmssmt-sha2-20-2-192 2021/04/xmldsig-more#xmssmt-sha2-20-2-192 2.2.6 xmssmt-sha2-20-2-256 2021/04/xmldsig-more#xmssmt-sha2-20-2-256 2.2.6 xmssmt-sha2-20-2-256 2021/04/xmldsig-more#xmssmt-sha2-20-2-512 2.2.6 xmssmt-sha2-20-4-192 2021/04/xmldsig-more#xmssmt-sha2-20-4-192 2.2.6 xmssmt-sha2-20-4-256 2021/04/xmldsig-more#xmssmt-sha2-20-4-256 2.2.6 xmssmt-sha2-20-4-256 2021/04/xmldsig-more#xmssmt-sha2-20-4-512 2.2.6 xmssmt-sha2-40-2-192 2021/04/xmldsig-more#xmssmt-sha2-40-2-192 2.2.6 xmssmt-sha2-40-2-256 2021/04/xmldsig-more#xmssmt-sha2-40-2-256 2.2.6 xmssmt-sha2-40-2-256 2021/04/xmldsig-more#xmssmt-sha2-40-2-512 2.2.6 xmssmt-sha2-40-4-192 2021/04/xmldsig-more#xmssmt-sha2-40-4-192 2.2.6 xmssmt-sha2-40-4-256 2021/04/xmldsig-more#xmssmt-sha2-40-4-256 2.2.6 xmssmt-sha2-40-4-256 2021/04/xmldsig-more#xmssmt-sha2-40-4-512 2.2.6 xmssmt-sha2-40-8-192 2021/04/xmldsig-more#xmssmt-sha2-40-8-192 2.2.6 xmssmt-sha2-40-8-256 2021/04/xmldsig-more#xmssmt-sha2-40-8-256 2.2.6 xmssmt-sha2-40-8-256 2021/04/xmldsig-more#xmssmt-sha2-40-8-512 2.2.6 xmssmt-sha2-60-3-192 2021/04/xmldsig-more#xmssmt-sha2-60-3-192 2.2.6 xmssmt-sha2-60-3-256 2021/04/xmldsig-more#xmssmt-sha2-60-3-256 2.2.6 xmssmt-sha2-60-3-256 2021/04/xmldsig-more#xmssmt-sha2-60-3-512 2.2.6 xmssmt-sha2-60-6-192 2021/04/xmldsig-more#xmssmt-sha2-60-6-192 2.2.6 xmssmt-sha2-60-6-256 2021/04/xmldsig-more#xmssmt-sha2-60-6-256 2.2.6 xmssmt-sha2-60-6-256 2021/04/xmldsig-more#xmssmt-sha2-60-6-512 2.2.6 xmssmt-sha2-60-12-192 2021/04/xmldsig-more#xmssmt-sha2-60-12-192 2.2.6 xmssmt-sha2-60-12-256 2021/04/xmldsig-more#xmssmt-sha2-60-12-256 2.2.6 xmssmt-sha2-60-12-256 2021/04/xmldsig-more#xmssmt-sha2-60-12-512 2.2.6 xmssmt-shake-20-2-256 2021/04/xmldsig-more#xmssmt-shake-20-2-256 2.2.6 xmssmt-shake-20-2-512 2021/04/xmldsig-more#xmssmt-shake-20-2-512 2.2.6 xmssmt-shake-20-4-256 2021/04/xmldsig-more#xmssmt-shake-20-4-256 2.2.6 xmssmt-shake-20-4-512 2021/04/xmldsig-more#xmssmt-shake-20-4-512 2.2.6 xmssmt-shake-40-2-256 2021/04/xmldsig-more#xmssmt-shake-40-2-256 2.2.6 xmssmt-shake-40-2-512 2021/04/xmldsig-more#xmssmt-shake-40-2-512 2.2.6 xmssmt-shake-40-4-256 2021/04/xmldsig-more#xmssmt-shake-40-4-256 2.2.6 xmssmt-shake-40-4-512 2021/04/xmldsig-more#xmssmt-shake-40-4-512 2.2.6 xmssmt-shake-40-8-256 2021/04/xmldsig-more#xmssmt-shake-40-8-256 2.2.6 xmssmt-shake-40-8-512 2021/04/xmldsig-more#xmssmt-shake-40-8-512 2.2.6 xmssmt-shake-60-3-256 2021/04/xmldsig-more#xmssmt-shake-60-3-256 2.2.6 xmssmt-shake-60-3-512 2021/04/xmldsig-more#xmssmt-shake-60-3-512 2.2.6 xmssmt-shake-60-6-256 2021/04/xmldsig-more#xmssmt-shake-60-6-256 2.2.6 xmssmt-shake-60-6-512 2021/04/xmldsig-more#xmssmt-shake-60-6-512 2.2.6 xmssmt-shake-60-12-256 2021/04/xmldsig-more#xmssmt-shake-20-12-256 2.2.6 xmssmt-shake-60-12-512 2021/04/xmldsig-more#xmssmt-shake-20-12-512 2.2.6 xmssmt-shake256-20-2-192 2021/04/xmldsig-more#xmssmt-shake256-20-2-192 2.2.6 xmssmt-shake256-20-2-256 2021/04/xmldsig-more#xmssmt-shake256-20-2-256 2.2.6 xmssmt-shake256-20-4-192 2021/04/xmldsig-more#xmssmt-shake256-20-4-192 2.2.6 xmssmt-shake256-20-4-256 2021/04/xmldsig-more#xmssmt-shake256-20-4-256 2.2.6 xmssmt-shake256-40-2-192 2021/04/xmldsig-more#xmssmt-shake256-40-2-192 2.2.6 xmssmt-shake256-40-2-256 2021/04/xmldsig-more#xmssmt-shake256-40-2-256 2.2.6 xmssmt-shake256-40-4-192 2021/04/xmldsig-more#xmssmt-shake256-40-4-192 2.2.6 xmssmt-shake256-40-4-256 2021/04/xmldsig-more#xmssmt-shake256-40-4-256 2.2.6 xmssmt-shake256-40-8-192 2021/04/xmldsig-more#xmssmt-shake256-40-8-192 2.2.6 xmssmt-shake256-40-8-256 2021/04/xmldsig-more#xmssmt-shake256-40-8-256 2.2.6 xmssmt-shake256-60-3-192 2021/04/xmldsig-more#xmssmt-shake256-60-3-192 2.2.6 xmssmt-shake256-60-3-256 2021/04/xmldsig-more#xmssmt-shake256-60-3-256 2.2.6 xmssmt-shake256-60-6-192 2021/04/xmldsig-more#xmssmt-shake256-60-6-192 2.2.6 xmssmt-shake256-60-6-256 2021/04/xmldsig-more#xmssmt-shake256-60-6-256 2.2.6 xmssmt-shake256-60-12-192 2021/04/xmldsig-more#xmssmt-shake256-60-12-192 2.2.6 xmssmt-shake256-60-12-256 2021/04/xmldsig-more#xmssmt-shake256-60-12-256 2.2.6 xptr 2001/04/xmldsig-more#xptr 2.5.1 --------- ---- -------- Fragment URI Sec/Doc The initial "http://www.w3.org/" part of the URI is not included above. Index by URI The initial "http://www.w3.org/" part of the URI is not included below. "{Bad}" indicates a Bad value that was accidentally included in . Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI. See also . URI Sec/Doc Type ---- -------- ------ 2000/09/xmldsig#base64 [RFC3275] Transform 2000/09/xmldsig#DSAKeyValue [RFC3275] Retrieval type 2000/09/xmldsig#dsa-sha1 [RFC3275] SignatureMethod 2000/09/xmldsig#enveloped-signature [RFC3275] Transform 2000/09/xmldsig#hmac-sha1 [RFC3275] SignatureMethod 2000/09/xmldsig#MgmtData [RFC3275] Retrieval type 2000/09/xmldsig#minimal 2.4 Canonicalization 2000/09/xmldsig#PGPData [RFC3275] Retrieval type 2000/09/xmldsig#rawX509Certificate [RFC3275] Retrieval type 2000/09/xmldsig#rsa-sha1 [RFC3275] SignatureMethod 2000/09/xmldsig#RSAKeyValue [RFC3275] Retrieval type 2000/09/xmldsig#sha1 [RFC3275] DigestAlgorithm 2000/09/xmldsig#SPKIData [RFC3275] Retrieval type 2000/09/xmldsig#X509Data [RFC3275] Retrieval type 2001/04/xmldsig-more#arcfour 2.6.1 EncryptionMethod 2001/04/xmldsig-more#camellia128-cbc 2.6.2 EncryptionMethod 2001/04/xmldsig-more#camellia192-cbc 2.6.2 EncryptionMethod 2001/04/xmldsig-more#camellia256-cbc 2.6.2 EncryptionMethod 2001/04/xmldsig-more#ecdsa-sha1 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha224 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha256 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha384 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha512 2.3.6 SignatureMethod 2001/04/xmldsig-more#esign-sha1 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha224 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha256 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha384 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha512 2.3.7 SignatureMethod 2001/04/xmldsig-more#hmac-md5 2.2.1 SignatureMethod 2001/04/xmldsig-more#hmac-ripemd160 2.2.3 SignatureMethod 2001/04/xmldsig-more#hmac-sha224 2.2.2 SignatureMethod 2001/04/xmldsig-more#hmac-sha256 2.2.2 SignatureMethod 2001/04/xmldsig-more#hmac-sha384 2.2.2 SignatureMethod 2001/04/xmldsig-more#hmac-sha512 2.2.2 SignatureMethod 2001/04/xmldsig-more#KeyName 3.2 Retrieval type 2001/04/xmldsig-more#KeyValue 3.2 Retrieval type 2001/04/xmldsig-more#kw-camellia128 2.6.3 EncryptionMethod 2001/04/xmldsig-more#kw-camellia192 2.6.3 EncryptionMethod 2001/04/xmldsig-more#kw-camellia256 2.6.3 EncryptionMethod 2001/04/xmldsig-more#md5 2.1.1 DigestAlgorithm 2001/04/xmldsig-more#PKCS7signedData 3.2 Retrieval type 2001/04/xmldsig-more#psec-kem 2.6.4 EncryptionMethod 2001/04/xmldsig-more#rawPGPKeyPacket 3.2 Retrieval type 2001/04/xmldsig-more#rawPKCS7signedData 3.2 Retrieval type 2001/04/xmldsig-more#rawSPKISexp 3.2 Retrieval type 2001/04/xmldsig-more#rawX509CRL 3.2 Retrieval type 2001/04/xmldsig-more#RetrievalMethod 3.2 Retrieval type 2001/04/xmldsig-more#rsa-md5 2.3.1 SignatureMethod 2001/04/xmldsig-more#rsa-sha224 2.3.11 SignatureMethod 2001/04/xmldsig-more#rsa-sha256 2.3.2 SignatureMethod 2001/04/xmldsig-more#rsa-sha384 2.3.3 SignatureMethod 2001/04/xmldsig-more#rsa-sha512 2.3.4 SignatureMethod 2001/04/xmldsig-more#rsa-ripemd160 2.3.5 SignatureMethod 2001/04/xmldsig-more#sha224 2.1.2 DigestAlgorithm 2001/04/xmldsig-more#sha384 2.1.3 DigestAlgorithm 2001/04/xmldsig-more#xptr 2.5.1 Transform 2001/04/xmldsig-more#PKCS7signedData 3.1 KeyInfo child 2001/04/xmlenc#aes128-cbc [XMLENC11] EncryptionMethod 2001/04/xmlenc#aes192-cbc [XMLENC11] EncryptionMethod 2001/04/xmlenc#aes256-cbc [XMLENC11] EncryptionMethod 2001/04/xmlenc#dh [XMLENC11] AgreementMethod 2001/04/xmlenc#kw-aes128 [XMLENC11] EncryptionMethod 2001/04/xmlenc#kw-aes192 [XMLENC11] EncryptionMethod 2001/04/xmlenc#kw-aes256 [XMLENC11] EncryptionMethod 2001/04/xmlenc#ripemd160 [XMLENC11] DigestAlgorithm 2001/04/xmlenc#rsa-1_5 [XMLENC11] EncryptionMethod 2001/04/xmlenc#rsa-oaep-mgf1p [XMLENC11] EncryptionMethod 2001/04/xmlenc#sha256 [XMLENC11] DigestAlgorithm 2001/04/xmlenc#sha512 [XMLENC11] DigestAlgorithm 2001/04/xmlenc#tripledes-cbc [XMLENC11] EncryptionMethod 2002/06/xmldsig-filter2 [XPATH] Transform 2002/07/decrypt#XML [DECRYPT] Transform 2002/07/decrypt#Binary [DECRYPT] Transform 2006/12/xmlc12n11# {Bad} [CANON11] Canonicalization 2006/12/xmlc14n11# [CANON11] Canonicalization 2006/12/xmlc14n11#WithComments [CANON11] Canonicalization 2007/05/xmldsig-more#ecdsa-ripemd160 2.3.6 SignatureMethod 2007/05/xmldsig-more#ecdsa-whirlpool 2.3.5 SignatureMethod 2007/05/xmldsig-more#kw-seed128 2.6.6 EncryptionMethod 2007/05/xmldsig-more#md2-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#md5-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#MGF1 2.3.9 SignatureMethod 2007/05/xmldsig-more#ripemd128-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#ripemd160-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#rsa-pss 2.3.9 SignatureMethod 2007/05/xmldsig-more#rsa-sha224 {Bad} 2.3.11 SignatureMethod 2007/05/xmldsig-more#rsa-whirlpool 2.3.5 SignatureMethod 2007/05/xmldsig-more#seed128-cbc 2.6.5 EncryptionMethod 2007/05/xmldsig-more#sha1-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha224-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha256-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-224 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-256 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-384 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-512 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha384-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha512-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#whirlpool 2.1.4 DigestAlgorithm 2007/05/xmldsig-more#whirlpool-rsa-MGF1 2.3.10 SignatureMethod 2009/xmlenc11#kw-aes-128-pad [XMLENC11] EncryptionMethod 2009/xmlenc11#kw-aes-192-pad [XMLENC11] EncryptionMethod 2009/xmlenc11#kw-aes-256-pad [XMLENC11] EncryptionMethod 2009/xmldsig11#dsa-sha256 [XMLDSIG11] SignatureMethod 2009/xmldsig11#ECKeyValue [XMLDSIG11] Retrieval type 2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11] Retrieval type 2009/xmlenc11#aes128-gcm [XMLENC11] EncryptionMethod 2009/xmlenc11#aes192-gcm [XMLENC11] EncryptionMethod 2009/xmlenc11#aes256-gcm [XMLENC11] EncryptionMethod 2009/xmlenc11#ConcatKDF [XMLENC11] KeyDerivation 2009/xmlenc11#mgf1sha1 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha224 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha256 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha384 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha512 [XMLENC11] SignatureMethod 2009/xmlenc11#pbkdf2 [XMLENC11] KeyDerivation 2009/xmlenc11#rsa-oaep [XMLENC11] EncryptionMethod 2009/xmlenc11#ECDH-ES [XMLENC11] AgreementMethod 2009/xmlenc11#dh-es [XMLENC11] EncryptionMethod 2010/xmlsec-ghc#generic-hybrid [GENERIC] Generic Hybrid 2010/xmlsec-ghc#rsaes-kem [GENERIC] Generic Hybrid 2010/xmlsec-ghc#ecies-kem [GENERIC] Generic Hybrid 2021/04/xmldsig-more#chacha20 2.6.7 EncryptionMethod 2021/04/xmldsig-more#chacha20poly1305 2.6.8 EncryptionMethod 2021/04/xmldsig-more#ecdsa-sha3-224 2.3.6 SignatureMethod 2021/04/xmldsig-more#ecdsa-sha3-256 2.3.6 SignatureMethod 2021/04/xmldsig-more#ecdsa-sha3-384 2.3.6 SignatureMethod 2021/04/xmldsig-more#ecdsa-sha3-512 2.3.6 SignatureMethod 2021/04/xmldsig-more#eddsa-ed25519ph 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed25519ctx 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed25519 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed448 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed448ph 2.3.12 SignatureMethod 2021/04/xmldsig-more#hkdf 2.8.1 KeyDerivation 2021/04/xmldsig-more#po1y305 2.2.4 SignatureMethod 2021/04/xmldsig-more#siphash-2-4 2.2.5 SignatureMethod 2021/04/xmldsig-more#x25519 2.7.1 AgreementMethod 2021/04/xmldsig-more#x448 2.7.1 AgreementMethod 2021/04/xmldsig-more#xmss-sha2-10-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-10-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-10-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-16-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-16-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-16-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-20-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-20-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-20-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-10-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-10-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-16-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-16-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-20-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-20-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-10-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-10-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-16-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-16-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-20-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-20-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-8-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-8-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-8-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-3-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-3-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-3-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-6-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-6-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-6-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-12-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-12-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-12-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-8-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-8-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-3-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-3-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-6-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-6-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-12-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-12-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-8-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-8-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-3-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-3-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-6-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-6-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-12-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-12-256 2.2.6 SignatureMethod TR/1999/REC-xpath-19991116 [XPATH] Transform TR/1999/REC-xslt-19991116 [XSLT] Transform TR/2001/06/xml-exc-c14n# [XCANON] Canonicalization TR/2001/06/xml-exc-c14n#WithComments [XCANON] Canonicalization TR/2001/REC-xml-c14n-20010315 [CANON10] Canonicalization TR/2001/REC-xml-c14n-20010315#WithComments [CANON10] Canonicalization TR/2001/REC-xmlschema-1-20010502 [SCHEMA] Transform ---- -------- ------ URI Sec/Doc Type The initial "http://www.w3.org/" part of the URI is not included above. "{Bad}" indicates a Bad value that was accidentally included in . Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI. See also . Allocation Considerations W3C and IANA allocation considerations are given below. W3C Allocation Considerations As it is easy for people to construct their own unique URIs and, if appropriate, to obtain a URI from the W3C, additional URI specification under the following XMLSEC URI prefixes is prohibited as shown: URI Status Frozen by W3C. Frozen with RFC 4051. Frozen with . The W3C has assigned for additional new URIs specified in this document. There are also occurrences in this document of due to the inclusion of some algorithms from for convenience. An "xmldsig-more" URI does not imply any official W3C or IETF status for these algorithms or identifiers nor does it imply that they are only useful in digital signatures. Currently, dereferencing such URIs may or may not produce a temporary placeholder document. Permission to use these URI prefixes has been given by the W3C. IANA Considerations IANA has established a registry entitled "XML Security URIs". The contents have been updated to correspond to of this document with each section number in the "Sec/Doc" column augmented with a reference to this RFC (for example, "2.6.4" means "[RFC9231], Section 2.6.4"). All references to in that registry have been updated to RFC 9231. New entries, including new Types, will be added based on Specification Required . Criteria for the designated expert for inclusion are (1) documentation sufficient for interoperability of the algorithm or data type and the XML syntax for its representation and use and (2) sufficient importance as normally indicated by inclusion in (2a) an approved W3C Note, Proposed Recommendation, or Recommendation, or (2b) an approved RFC. Typically, the registry will reference a W3C or IETF document specifying such XML syntax; that document will either contain a more detailed description of the algorithm or data type or reference another document with a more detailed description. Security Considerations This RFC is concerned with documenting the URIs that designate algorithms and some data types used in connection with XML security. The security considerations vary widely with the particular algorithms, and the general security considerations for XML security are outside of the scope of this document but appear in , , , , and . should be consulted before considering the use of MD5 as a DigestMethod or the use of HMAC-MD5 or RSA-MD5 as a SignatureMethod. See for SHA-1 security considerations. Additional security considerations are given in connection with the description of some algorithms in the body of this document. Implementers should be aware that cryptographic algorithms become weaker with time. As new cryptoanalysis techniques are developed and computing performance improves, the work factor to break a particular cryptographic algorithm will decrease. Therefore, cryptographic implementations should be modular, allowing new algorithms to be readily inserted. That is, implementers should be prepared for the set of mandatory-to-implement algorithms for any particular use to change over time. This is sometimes referred to as "algorithm agility" .

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