The invention provides a credible identity
authentication method and
system with
privacy protection and
traceability, and the method comprises the steps: S1, defining roles in an identity
authentication process and a supervision
traceability process and the function division of each role, including a user, a registration organization RA, a
certificate issuer Issuer, a
service provider SP and a supervision committee RegComm; s2, realizing an identity
authentication process through a real name authentication
verification process, an anonymous identity
certificate signing and issuing process and a user identity authentication proving process; wherein in the anonymous identity
certificate issuing process, a certificate issuer Issuer issues a verifiable anonymous identity certificate to a user through a formula according to a real name authentication
verification result of a
registration authority RA; and S3, realizing a supervision and tracing process through user secret distribution and a
user information tracing process. According to the invention, an identity authentication process based on zero-knowledge proof and verifiable
secret sharing is realized, a supervision and tracing process is introduced, and practical application requirements of
privacy protection and
traceability can be met at the same time.