Dynamic encryption method of personal privacy information in social network based on blockchain technology Online publication date: Mon, 12-Sep-2022
by Feifei Geng; Lu Yu
International Journal of Web Based Communities (IJWBC), Vol. 18, No. 3/4, 2022
Abstract: In order to overcome the problems of low encryption accuracy, long encryption time and poor encryption effect in traditional methods, a dynamic encryption method of personal privacy information in social networks based on blockchain technology is proposed. In this paper, cryptography encryption method is used to obtain the personal privacy information of social network, according to homomorphic encryption to obtain the privacy information plaintext to be encrypted. Then hash function model is constructed, and the hash value is stored in the blockchain to obtain the personal privacy protection information key. Finally, the personal privacy information record blockchain is read, and the blind attribute encryption of personal privacy information is realised. The results show that when the amount of information is 500 GB, the data recall rate is up to 99%, the encryption accuracy is up to 99.9%, and the average information entropy is 8.9242, indicating that the proposed method can improve the privacy information encryption effect.
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