Voting method based on group signatures in block chain

Abstract

The invention discloses a voting method based on a group signature in a block chain, which can be applied to the fields of credit assessment, identity verification and the like. The method comprises the following steps: S01, selecting a trusted center; s02, carrying out registration; s03, carrying out share signature; s04, synthesizing a group signature; s05, performing signature verification; s06, backing up the signature information; s07, opening a signature; s08: canceling the signature. According to the invention, through cooperation of the user and the trusted center, the share signatureis generated and synthesized into the group signature. In order to protect the user identity information, blind processing is carried out on the user signature information. In order to solve the problem that a system is unavailable due to the fact that a trusted center is attacked, the user signature information of the trusted center is backed up; the credible center is allowed to be dynamically adjusted, the threshold group signature scheme makes up for anonymous vulnerabilities in the realization of the original block chain design, the difficulty is equivalent to the elliptic curve discretelogarithm, the false name attack can be effectively resisted, the calculation amount of the algorithm is lower, and the algorithm can be effectively adapted to the block chain application scene.

Description

technical field [0001] The invention relates to a voting method based on group signatures in a block chain, which can be used in fields such as credit evaluation and identity verification. Background technique [0002] Blockchain is a distributed database technology that records transaction history. It has the characteristics of "decentralization", "anonymization" and "trustlessness". It solves the problem of data credibility between different nodes. It is used in electronic currency, Financial investment, Internet of Things, medical care, energy Internet and other fields have developed rapidly. Blockchains are mainly divided into three categories, namely, public chains, alliance chains, and private chains. At present, blockchain-based voting systems on alliance chains and private chains have emerged for credit evaluation, decision-making and other scenarios. [0003] The identity information in the blockchain node is similar to the bank card account number. It is the pseud...

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Problems solved by technology

Therefore, the original blockchain architecture cannot guarantee anonymity, how to design a highly

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