Electronic evidence preservation system and method based on block chain technology

Abstract

The invention discloses an electronic evidence preservation system and method based on the block chain technology. The preservation system comprises an evidence storage terminal and a block chain network. The evidence storage terminal comprises a hash operation module and an electronic signature module. The electronic data are uploaded to the evidence storage terminal, the evidence storage terminal performs hash operation on the uploaded electronic data to generate unique feature data of a fixed length of original data; then private key signature is performed on the generated data by using theasymmetric encryption technology, and the generated data are sent to the block chain network; and the block chain network performs primary consensus on the uploaded data and packs the uploaded data into blocks, and synchronously sends the blocks to nodes in the network for distributed storage. By establishing an evidence storage alliance by using the block chain technology, the electronic evidence preservation system has the characteristics of digitalized encryption, centralized grading, anti-tampering, data zero loss and so on. Each node in the block chain can preserve a complete block chaindata copy and witness the chain status of the blocks, so that the centralization risk can be effectively avoided.

Description

technical field [0001] The present invention relates to the field of Internet technology, in particular to an electronic evidence preservation system and method based on block chain technology. Background technique [0002] Existing storage platforms (including computer room storage, cloud storage, etc.) use their own credit or authority to provide services such as deposit, preservation, and witness of electronic evidence. However, driven by economic interests, electronic data stored in a centralized manner may be tampered with or deleted. Therefore, the judicial effectiveness of electronic data stored in a centralized manner is not strong, and has not been recognized as judicial effectiveness in many cases. [0003] See invention patent: [0004] 2016105050504 (Internet evidence collection method, device, and Internet security system server side) [0005] 2016106245054 (Internet evidence collection method, device and Internet security system client) [0006] 20161016019...

AI Technical Summary

Problems solved by technology

[0010] (2) The certificate storage terminal may be a mobile app, client software, a certificate storage plug-in embedded in the user system, or a certificate storage website

[0013] Through the announcement method, it is difficult for users to take screenshots and fix the global supervision summary data at the first time. If they miss it, they cannot go back and check with the security system construction operator.

[0014] Some systems can query the global supervision summary data of the evidence storage data according to the conditions, but the global supervision summary data is stored in the security center, which cannot completely prevent the data from being tampered with

[0015] The global supervision summary can only detect whether the data has been tampered with, and cannot prevent the data from being tampered with by the security center

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