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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 Unassigned -65534 to -261 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 -48 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] Yes ES384 -35 ECDSA w/ SHA-384 [kty] [RFC9053] Yes 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 -19 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 Unassigned -9 EdDSA -8 EdDSA [kty] [RFC9053] Yes ES256 -7 ECDSA w/ SHA-256 [kty] [RFC9053] Yes 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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CBOR Object Signing and Encryption (COSE) - Internet Assigned Numbers ...