An Anonymous Authentication Method Based on Group Signature in Standard Model

Abstract

The invention relates to an anonymous authentication method based on a group signature under a standard model, belonging to the field of network information security. It can meet the anonymous authentication requirements between platforms and the anonymous authentication algorithm of remote proof. Including: Step 1: The publisher generates system parameters, group public key and publisher private key. Step 2: Extract keys for group manager GM and group member A. Step 3: When user i wants to perform group signature on a message m, first re-randomize his certificate to generate a key pair; use his own group signature key to perform group signature on message m, member certificate, and strong one-time signature verification key Sign and give a zero-knowledge proof. Step 4: After receiving the signature, the recipient verifies the signature and the user identity certificate. If both the identity and the signature satisfy the verification equation, the verification is passed and the signature is accepted, otherwise it is rejected. Step 5: When a dispute occurs among group members, the group manager GM opens the group member certificate and returns i, evidence, thereby confirming the identity of the group member.

Description

technical field [0001] The invention relates to an anonymous authentication method based on a group signature under a standard model, belonging 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 dis...

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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