Confusable anonymous authentication method

Abstract

The invention relates to a confusable anonymous authentication method used for protecting identity information and a private authentication key of a user in an authentication system. A system administrator and a tracker are arranged in the authentication system; the system administrator is configured with a global public parameter, a master key, and a key pair for linear encryption and decryption;and a system user is configured with a private authentication key. The anonymous authentication method specifically comprises the following steps: confusing the private authentication key by the system user to obtain an obfuscation key; generating an authentication array containing a service request based on the obfuscation key by the system user, and sending the authentication array to a server;performing legality authentication on the authentication array by the server, and performing liveness verification on the system user; providing a service corresponding to the service request to a system user who passes the legality authentication and the liveness verification; and when any one of the legality verification and the liveness verification is not passed, tracking the corresponding system user by the tracker. Compared with the prior art, the confusable anonymous authentication method provided by the invention has the advantages of being traceable, low in attack success probabilityand the like.

Description

technical field [0001] The invention relates to the fields of cryptography, anonymous authentication and confusion theory, in particular to a confusing anonymous authentication method. Background technique [0002] Anonymous Authentication (AA for short) is an authentication method based on digital signatures and capable of providing anonymity. In recent years, a series of anonymous authentication schemes have been proposed to be applicable to various application fields. Traditional anonymous authentication usually has the following properties: 1) authenticity / correctness, 2) unforgeability, 3) non-reproducibility, 4) non-repudiation, 5) anonymity, 6) non-linkability, 7) conditional traceability. An anonymous authentication method can be based on different signature methods such as: blind signature, ring signature, traceable signature, group signature, etc. [0003] In traditional anonymous authentication schemes, the user's private authentication key is often directly us...

AI Technical Summary

Problems solved by technology

Obfuscation transformation provides a conversion mechanism to keep the function of the converted program unchanged, but at this time the program or its decompiled results are difficult to understand and analyze

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