Anonymous authentication scheme of group signatures under standard model

Abstract

The invention relates to an anonymous authentication scheme of group signatures under a standard model, and belongs to the field of network information security. The scheme can meet a requirement of anonymous authentication between platforms and an anonymous authentication algorithm of remote certification, and includes: step 1, generating system parameters, a group public-key and publisher private-keys by publishers; step 2, extracting keys for a group manager GM and a group member A; step 3, when a user i wants to carry out group signature on a message m, firstly re-randomizing a certificatethereof, generating a key pair, using a group signature key thereof to carry out signature on the message m, a member certificate and a verification key of previous signature, and giving a zero-knowledge proof; step 4, verifying a signature and a user identity certificate after a recipient receives the signature, if an identity and the signature both meet a verification equation, determining verification as successful, and accepting the signature, and otherwise, rejecting authentication; and step 5, when a dispute of group members occurs, opening group member certificates by the group managerGM, returning i and evidence, and thus determining a group membership identity.

Description

technical field [0001] The invention relates to an anonymous authentication scheme based on group signature under a standard model, which belongs to the field of network information security. Background technique [0002] With the continuous development of electronic technology and network technology, people are more and more dependent on the network, especially communication technology has become an indispensable part of people's life, and network and information security are also increasingly affected by the development of technology. Widespread concern. In the group signature system, some signing members form a group, each member has a different signature key, and the signature key corresponds to the unique group public key in the group. Any member of the group can sign the message on behalf of the group, and the verifier can use the group public key to verify the validity of the signature, but cannot determine the identity of the signer from a group signature. When a d...

AI Technical Summary

Problems solved by technology

[0006] Most of the practical group signature schemes that have been proposed have proved security in the random oracle model (ROM). completely random

Ateniese et al. gave an efficient group signature scheme in the standard model, but proved its security under non-standard assumptions

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