A blockchain-based data security system and method

Abstract

The invention discloses a data security system and method based on a block chain. The method comprises the following steps: encrypting an electronic data file; computing an abstract by using access time and cipher-text, and writing the abstract into the block chain; saving the cipher-text and the access time into cloud storage, and returning storage location information of the block chain and storage location information of the cloud storage, respectively acquiring the abstract, the cipher-text and the access time by using the storage location information of the block chain and the storage location information of the cloud storage; re-computing the abstract by using the acquired cipher-text and the access time, comparing a computation result with the abstract directly acquired from the block chain, and decrypting the cipher-text to obtain an electronic data file if the computation result is consistent with the acquired abstract; otherwise, reporting an error and terminating the operation. Through the system and method disclosed by the invention, the data is saved by using hybrid architecture of the block chain and the cloud storage, and the access time is acquired when the electronic data and the abstract thereof are written into the cloud storage and the block chain; and the invention not only provides unique time proof of the original creativity provided for the electronic data, but also ensures that the electronic data is true and traceable, and tamper-resistant.

Description

technical field [0001] The present invention relates to the field of information technology, in particular to a blockchain-based data preservation system and method. Background technique [0002] With the rapid development of Internet technology, network information is more abundant, network transactions are more frequent, network original works emerge in endlessly, e-government affairs, information construction of enterprises and institutions are also becoming more and more perfect, and the amount of data is constantly increasing. While enjoying the convenience that Internet technology brings to life and work, we also face potential risks and hidden dangers brought about by the Internet and informatization. [0003] Whether it is in the process of information interaction on the Internet, or in the process of e-government affairs, information construction of enterprises and institutions, a large amount of electronic data will be generated. These electronic data are easy to d...

AI Technical Summary

Problems solved by technology

[0003] Whether it is in the process of information interaction on the Internet, or in the process of e-government and information construction of enterprises and institutions, a large amount of electronic data will be generated. These electronic data are easy to disappear, easy to change, have no time stamp, and low cost of copying. , vulnerable to infringement and other issues

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