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CBOR Object Signing and Encryption (COSE)
Reserved for Private Use less than -65536 [RFC9053] No Unassigned -65536 RS1 -65535 RSASSA-PKCS1-v1_5 using SHA-1 [kty] IESG [RFC8812][RFC9053] Deprecated A128CTR -65534 AES-CTR w/ 128-bit key [kty] IETF [RFC9459] Deprecated A192CTR -65533 AES-CTR w/ 192-bit key [kty] IETF [RFC9459] Deprecated A256CTR -65532 AES-CTR w/ 256-bit key [kty] IETF [RFC9459] Deprecated A128CBC -65531 AES-CBC w/ 128-bit key [kty] IETF [RFC9459] Deprecated A192CBC -65530 AES-CBC w/ 192-bit key [kty] IETF [RFC9459] Deprecated A256CBC -65529 AES-CBC w/ 256-bit key [kty] IETF [RFC9459] Deprecated Unassigned -65528 to -269 ESB512 -268 ECDSA using BrainpoolP512r1 curve and SHA-512 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] No ESB384 -267 ECDSA using BrainpoolP384r1 curve and SHA-384 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] No ESB320 -266 ECDSA using BrainpoolP320r1 curve and SHA-384 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] No ESB256 -265 ECDSA using BrainpoolP256r1 curve and SHA-256 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] No KT256 -264 KT256 XOF [kty] IETF [RFC-irtf-cfrg-kangarootwelve-17] No KT128 -263 KT128 XOF [kty] IETF [RFC-irtf-cfrg-kangarootwelve-17] No TurboSHAKE256 -262 TurboSHAKE256 XOF [kty] IETF [RFC-irtf-cfrg-kangarootwelve-17] No TurboSHAKE128 -261 TurboSHAKE128 XOF [kty] IETF [RFC-irtf-cfrg-kangarootwelve-17] No WalnutDSA -260 WalnutDSA signature [kty] [RFC9021][RFC9053] No RS512 -259 RSASSA-PKCS1-v1_5 using SHA-512 [kty] IESG [RFC8812][RFC9053] No RS384 -258 RSASSA-PKCS1-v1_5 using SHA-384 [kty] IESG [RFC8812][RFC9053] No RS256 -257 RSASSA-PKCS1-v1_5 using SHA-256 [kty] IESG [RFC8812][RFC9053] No Unassigned -256 to -54 Ed448 -53 EdDSA using Ed448 curve [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] Yes ESP512 -52 ECDSA using P-521 curve and SHA-512 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] Yes ESP384 -51 ECDSA using P-384 curve and SHA-384 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] Yes ML-DSA-87 -50 CBOR Object Signing Algorithm for ML-DSA-87 (TEMPORARY - registered 2025-04-24, expires 2026-04-24) [kty] [draft-ietf-cose-dilithium-06] Yes ML-DSA-65 -49 CBOR Object Signing Algorithm for ML-DSA-65 (TEMPORARY - registered 2025-04-24, expires 2026-04-24) [kty] [draft-ietf-cose-dilithium-06] Yes ML-DSA-44 -48 CBOR Object Signing Algorithm for ML-DSA-44 (TEMPORARY - registered 2025-04-24, expires 2026-04-24) [kty] [draft-ietf-cose-dilithium-06] Yes ES256K -47 ECDSA using secp256k1 curve and SHA-256 [kty] IESG [RFC8812][RFC9053] No HSS-LMS -46 HSS/LMS hash-based digital signature [kty] [RFC8778][RFC9053] Yes SHAKE256 -45 SHAKE-256 512-bit Hash Value [kty] [RFC9054][RFC9053] Yes SHA-512 -44 SHA-2 512-bit Hash [kty] [RFC9054][RFC9053] Yes SHA-384 -43 SHA-2 384-bit Hash [kty] [RFC9054][RFC9053] Yes RSAES-OAEP w/ SHA-512 -42 RSAES-OAEP w/ SHA-512 [kty] [RFC8230][RFC9053] Yes RSAES-OAEP w/ SHA-256 -41 RSAES-OAEP w/ SHA-256 [kty] [RFC8230][RFC9053] Yes RSAES-OAEP w/ RFC 8017 default parameters -40 RSAES-OAEP w/ SHA-1 [kty] [RFC8230][RFC9053] Yes PS512 -39 RSASSA-PSS w/ SHA-512 [kty] [RFC8230][RFC9053] Yes PS384 -38 RSASSA-PSS w/ SHA-384 [kty] [RFC8230][RFC9053] Yes PS256 -37 RSASSA-PSS w/ SHA-256 [kty] [RFC8230][RFC9053] Yes ES512 -36 ECDSA w/ SHA-512 [kty] [RFC9053][RFC-ietf-jose-fully-specified-algorithms-13] Deprecated ES384 -35 ECDSA w/ SHA-384 [kty] IETF [RFC9053][RFC-ietf-jose-fully-specified-algorithms-13] Deprecated ECDH-SS + A256KW -34 ECDH SS w/ Concat KDF and AES Key Wrap w/ 256-bit key [kty] [RFC9053] Yes ECDH-SS + A192KW -33 ECDH SS w/ Concat KDF and AES Key Wrap w/ 192-bit key [kty] [RFC9053] Yes ECDH-SS + A128KW -32 ECDH SS w/ Concat KDF and AES Key Wrap w/ 128-bit key [kty] [RFC9053] Yes ECDH-ES + A256KW -31 ECDH ES w/ Concat KDF and AES Key Wrap w/ 256-bit key [kty] [RFC9053] Yes ECDH-ES + A192KW -30 ECDH ES w/ Concat KDF and AES Key Wrap w/ 192-bit key [kty] [RFC9053] Yes ECDH-ES + A128KW -29 ECDH ES w/ Concat KDF and AES Key Wrap w/ 128-bit key [kty] [RFC9053] Yes ECDH-SS + HKDF-512 -28 ECDH SS w/ HKDF - generate key directly [kty] [RFC9053] Yes ECDH-SS + HKDF-256 -27 ECDH SS w/ HKDF - generate key directly [kty] [RFC9053] Yes ECDH-ES + HKDF-512 -26 ECDH ES w/ HKDF - generate key directly [kty] [RFC9053] Yes ECDH-ES + HKDF-256 -25 ECDH ES w/ HKDF - generate key directly [kty] [RFC9053] Yes Unassigned -24 to -20 Ed25519 -19 EdDSA using Ed25519 curve [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] Yes SHAKE128 -18 SHAKE-128 256-bit Hash Value [kty] [RFC9054][RFC9053] Yes SHA-512/256 -17 SHA-2 512-bit Hash truncated to 256-bits [kty] [RFC9054][RFC9053] Yes SHA-256 -16 SHA-2 256-bit Hash [kty] [RFC9054][RFC9053] Yes SHA-256/64 -15 SHA-2 256-bit Hash truncated to 64-bits [kty] [RFC9054][RFC9053] Filter Only SHA-1 -14 SHA-1 Hash [kty] [RFC9054][RFC9053] Filter Only direct+HKDF-AES-256 -13 Shared secret w/ AES-MAC 256-bit key [kty] [RFC9053] Yes direct+HKDF-AES-128 -12 Shared secret w/ AES-MAC 128-bit key [kty] [RFC9053] Yes direct+HKDF-SHA-512 -11 Shared secret w/ HKDF and SHA-512 [kty] [RFC9053] Yes direct+HKDF-SHA-256 -10 Shared secret w/ HKDF and SHA-256 [kty] [RFC9053] Yes ESP256 -9 ECDSA using P-256 curve and SHA-256 [kty] IETF [RFC-ietf-jose-fully-specified-algorithms-13] Yes EdDSA -8 EdDSA [kty] IETF [RFC9053][RFC-ietf-jose-fully-specified-algorithms-13] Deprecated ES256 -7 ECDSA w/ SHA-256 [kty] IETF [RFC9053][RFC-ietf-jose-fully-specified-algorithms-13] Deprecated direct -6 Direct use of CEK [kty] [RFC9053] Yes A256KW -5 AES Key Wrap w/ 256-bit key [kty] [RFC9053] Yes A192KW -4 AES Key Wrap w/ 192-bit key [kty] [RFC9053] Yes A128KW -3 AES Key Wrap w/ 128-bit key [kty] [RFC9053] Yes Unassigned -2 to -1 Reserved 0 [RFC9053] No A128GCM 1 AES-GCM mode w/ 128-bit key, 128-bit tag [kty] [RFC9053] Yes A192GCM 2 AES-GCM mode w/ 192-bit key, 128-bit tag [kty] [RFC9053] Yes A256GCM 3 AES-GCM mode w/ 256-bit key, 128-bit tag [kty] [RFC9053] Yes HMAC 256/64 4 HMAC w/ SHA-256 truncated to 64 bits [kty] [RFC9053] Yes HMAC 256/256 5 HMAC w/ SHA-256 [kty] [RFC9053] Yes HMAC 384/384 6 HMAC w/ SHA-384 [kty] [RFC9053] Yes HMAC 512/512 7 HMAC w/ SHA-512 [kty] [RFC9053] Yes Unassigned 8-9 AES-CCM-16-64-128 10 AES-CCM mode 128-bit key, 64-bit tag, 13-byte nonce [kty] [RFC9053] Yes AES-CCM-16-64-256 11 AES-CCM mode 256-bit key, 64-bit tag, 13-byte nonce [kty] [RFC9053] Yes AES-CCM-64-64-128 12 AES-CCM mode 128-bit key, 64-bit tag, 7-byte nonce [kty] [RFC9053] Yes AES-CCM-64-64-256 13 AES-CCM mode 256-bit key, 64-bit tag, 7-byte nonce [kty] [RFC9053] Yes AES-MAC 128/64 14 AES-MAC 128-bit key, 64-bit tag [kty] [RFC9053] Yes AES-MAC 256/64 15 AES-MAC 256-bit key, 64-bit tag [kty] [RFC9053] Yes Unassigned 16-23 ChaCha20/Poly1305 24 ChaCha20/Poly1305 w/ 256-bit key, 128-bit tag [kty] [RFC9053] Yes AES-MAC 128/128 25 AES-MAC 128-bit key, 128-bit tag [kty] [RFC9053] Yes AES-MAC 256/128 26 AES-MAC 256-bit key, 128-bit tag [kty] [RFC9053] Yes Unassigned 27-29 AES-CCM-16-128-128 30 AES-CCM mode 128-bit key, 128-bit tag, 13-byte nonce [kty] [RFC9053] Yes AES-CCM-16-128-256 31 AES-CCM mode 256-bit key, 128-bit tag, 13-byte nonce [kty] [RFC9053] Yes AES-CCM-64-128-128 32 AES-CCM mode 128-bit key, 128-bit tag, 7-byte nonce [kty] [RFC9053] Yes AES-CCM-64-128-256 33 AES-CCM mode 256-bit key, 128-bit tag, 7-byte nonce [kty] [RFC9053] Yes IV-GENERATION 34 For doing IV generation for symmetric algorithms. [RFC9053] No
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