An encryption algorithm for user's sensitive information resources in network database

Abstract

At present, the encryption process of simple one-dimensional chaotic system has limitations, which leads to the poor security of sensitive information in the network database. To solve this problem, in this paper, a secondary encryption algorithm based on NCA mapping was proposed for user’s information resource with spatio-temporal chaotic. By using the sensitivity, scrambling and randomness characteristics of initial value in dual chaotic system which was based on Logistic mapping combined with Henon mapping, the algorithm was applied to the generation of key, to make double encryption of plaintext. The dual chaotic system which combined Logistic mapping and Henon mapping was improved, and a new spatio-temporal chaotic system based on NCA mapping was constructed. NCA mapping was used to control the scrambling process of sensitive information, and the spatio-temporal chaotic sequence was used to change the diffusion process of sensitive information, to complete the encryption of user’s sensitive information resource in network database. The experimental results show that the proposed algorithm can effectively encrypt sensitive information and improve the security of network database operation.