Editable, linkable and non-repudiation ring signature method

Abstract

The invention discloses an editable, linkable and non-repudiation ring signature method, belongs to the field of network security, and solves the problems of difficulty in revocation of a ring signature, difficulty in tracing identity information of a malicious user, capability of being authenticated by the signature after being edited, no privacy protection, no flexible authentication mechanism and the like in the prior art. The method is used for sequentially carrying out system initialization, user key generation, hash key generation and signature and providing conditional revocation identity privacy, editable and non-repudiation ring signatures. After the signature is edited, if the signature is required to be edited and whether the signature can be linked or repudiated is judged, thesignature is verified respectively, and after the verification is passed, the signature is edited and whether the signature can be linked or repudiated and the like is judged to be used for providingidentity privacy capable of being revoked, editable and non-repudiated ring signatures.

Description

technical field [0001] An editable, linkable, and non-repudiable ring signature method belongs to the field of network security, and is used to provide identity privacy, editable, and non-repudiation ring signatures that can be conditionally revoked. Background technique [0002] The ring signature is evolved from the group signature. Unlike the group signature, which has a group administrator as the center, the ring signature does not rely on such a center. Simply put, ring signature is spontaneous, that is, a user in the ring arbitrarily selects the public keys of other users to form a ring required for signature, which is used to hide the user's public key, while other users on the ring The identity privacy of the signers is achieved without any knowledge that they are being added to the ring. [0003] The current ring signature has the problem that identity privacy conditions are difficult to revoke and cannot be edited. For the former (difficult to revoke), due to the...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of the above research, the purpose of the present invention is to provide an editable, linkable and non-repudiable ring signature method, which solves the difficulty of revoking the ring signature in the prior art, and it is difficult to trace the identity information of malicious users. It can still be authenticated by signatures, and does not have issues such as privacy protection and flexible authentication mechanisms

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