A Blockchain-based Electronic Data Forensics System Design and Implementation

With the rapid development of the digital economy, in judicial practice, the type of evidence is developing from physical evidence to electronic evidence. Compared with traditional physical evidence, electronic evidence is vulnerable to external network attacks and tampering by internal practitioners in the process of collection, fixation, storage, transmission, etc. Therefore, determining the authenticity of electronic evidence is costly and difficult to admit, which directly affects the proportion of electronic evidence admissible in litigation. The unique characteristics of blockchain technology, such as tamper-proof, traceability, and multi-party participation, naturally fit with the demand for electronic data deposition. The electronic data deposit based on blockchain technology can avoid evidence forgery and reduce the impact of network attacks, ensure the authenticity of electronic evidence, and improve the admissibility rate of electronic evidence. This paper proposes a blockchain smart contract- based deposition system, which can realize the digital fingerprint deposition of documents by users, and can also display the timestamp of the evidence while the evidence is on the chain as well as the forensic evidence, thus ensuring the traceability and security of the evidence on the chain. Improve the efficiency and security of electronic data deposition.