关键词: 混沌映射, 身份认证标识, Hash函数, 加密

Abstract: The encryption, secret storage, and authentication of user-identity-identifier are the necessary steps in the copyright protection for software, and so on. In this paper, we propose a piecewise-linear chaotic map and construct its composite function whose statistic characteristics are analyzed. For the purpose of encrypting user-identity-identifier, a chaotic-map-based Hash function is constructed. Based on the first function, other Hash functions are also constructed to generate certificate in which user-identity-identifier is hidden. The authors’ experiment results show that the proposed algorithms are exact, security, efficient, and practical for information encryption and identity certification.

Key words: chaotic map, identity identifier, Hash function, encryption