Data preservation method and system based on block chain

Abstract

The invention discloses a data preservation method and system based on a block chain. The method comprises the following steps: a specific user terminal sending a to-be-preserved target file to a center server terminal, the center server terminal performing a data preservation operation on source data of a target file to acquire a preserved data fingerprint of the source data; the center server terminal storing a target file ID corresponding to the target file and the source data, sending the target file ID corresponding to the target file and the preserved data fingerprint to other user terminal and the specific user terminal connected with the block chain; the other user terminal and the specific user terminal connected with the block chain receiving and storing the target file ID corresponding to the target file and the preserved data fingerprint. Each user terminal connected with the block chain only saves the fingerprint information and does not save the source data, and the center server terminal only saves the source data and does not save the fingerprint information; therefore, the source data and the fingerprint are separated, and security of the preserved data is guaranteed.

Description

technical field [0001] The invention relates to the field of data security assurance, in particular to a data preservation method and system. Background technique [0002] The purpose of data preservation is to solidify and protect the electronic contracts and orders that users need to protect through security technologies and means to prevent them from being tampered with. Data security guarantee includes the protection of data integrity and confidentiality. The purpose of integrity protection is to combat data and its related attributes that can be attacked in different ways, which may include: unauthorized data tampering, deletion, creation, insertion, replay, etc. Data integrity protection is to prevent such dangers through effective means, or to discover threats and minimize their impact through effective means. The purpose of confidentiality protection is to ensure that other platforms except the user cannot obtain the plaintext of the data to be preserved, so as to ...

AI Technical Summary

Problems solved by technology

[0004] With the development of Internet finance, people often form a large number of electronic contracts about transactions through various online activities such as online shopping, online chatting, and emails. How to ensure the legal validity of electronic contracts for a single transaction has become an important issue in the field of electronic contracts. New applications, the data fragmentation of electronic contracts generated by Internet finance, if each transaction is formed into a file and then stored, will greatly increase the cost of the transaction and affect the competitiveness of the platform, so the traditional security scheme is very important for fragmented data security. inappropriate

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