Abstract:

The era of big data has arrived, and the digitization of archive information is the future development trend. How to protect the privacy of digital archive information is a key research topic in the computer field. At present, the archive privacy protection algorithm based on blockchain technology has problems such as poor protection effect and long operation time. In order to solve the problems existing in traditional methods, a digital archive information privacy protection algorithm based on blockchain technology is proposed. Firstly, apply blockchain technology to the privacy protection process of digital archive information. The specific protection

process is as follows: the data owner uses symmetric encryption algorithms to encrypt the digital archive information and upload it to the private chain; At the same time, generate a secure index of digital archive information and upload it to the alliance chain; The data user generates a query threshold for the keywords to be queried, sends it to the private chain, obtains the query results on the private chain, and sends them to the alliance chain. The alliance chain cooperates with the private chain to verify the correctness of the query results. If it is correct, the alliance chain will send the converted encrypted data to the data user. The experimental results show that the privacy protection algorithm for digital archive information of the proposed method has good privacy protection effect and practical application effect.

Key words: digital archive information, blockchain technology, privacy protection algorithm, symmetric encryption algorithm, security index structure