Value,Description,Reference
0,rsa2048_pkcs1.5,[RFC-ietf-uta-token-binding-protocol-21]
1,rsa2048_pss,[RFC-ietf-uta-token-binding-protocol-21]
2,ecdsap256,[RFC-ietf-uta-token-binding-protocol-21]
3-255,Unassigned,