Blockchain-based cryptographic model for electronic evidence authentication

With the continuous rapid development of computer and sensing technology, relevant electronic documents have become an important form of evidence in the process of electricity production, while electronic evidence is also an important element of evidence in the judicial field. However, because the current sharing of electronic evidence is basically based on centralized storage and sharing methods, it is easy to cause the leakage and forgery of electronic evidence, and it is difficult to determine the authenticity of electronic evidence. In order to solve these problems, we propose a blockchain-based encryption model for electronic evidence authentication, in which the decentralization of blockchain is used to realize a distributed trust mechanism for electronic evidence without a trusted third-party institution. At the same time, a multi-centered ring signature scheme is designed to authenticate and encrypt electronic evidence in order to prevent the leakage of electronic evidence to non-authorized users. Through experimental analysis, the proposed scheme has a high level of safety without affecting the efficiency of use.