Based on elliptic curve public key cryptosystem and with the help of ring signature,a traceable and anonymous authen-tication scheme is proposed.The security of the proposed scheme is based on the difficulty of solving elliptic curve discrete loga-rithm problem(ECDLP)and the computational Diffie-Hellman assumption(CDHA).In order to prevent random tracing,the threshold technology is introduced into anonymous tracing.In addition,in the signature generation process,using the private key and the additional random number,the signature satisfies un-forgeability.Compared with the existing schemes,the communi-cation overhead of the proposed scheme is relatively small.In the case of similar calculational overhead,the proposed scheme not only has anonymous authentication,signature unforgeability,but also has threshold traceability.