基于分段非线性混沌映射的流密码加密方案

Stream cipher encryption scheme based on piecewise nonlinear chaotic map

基于分段非线性混沌映射设计了一种流密码加密方案。用Logistic映射的输出作为分段非线性映射的分段参数,以Henon映射输出的混沌序列经运算后得到迭代次数,分段非线性混沌映射的输出与明文相加取模后生成密文。仿真实验和安全性分析表明,该方案的密钥空间大,对明文和密钥敏感,能有效抵抗穷举攻击、差分攻击和统计攻击,且实时性较好。

A stream cipher encryption scheme was designed based on piecewise nonlinear chaotic map. The control parameter and iteration numbers of piecewise nonlinear chaotic map was produced by Logistic map and Henon map after the computation, and its outputs were added to the plaintext with modulus to obtain the ciphertext. The simulation and security analysis indicate that the proposed scheme possesses large key space, and has high sensitivity to plaintext and key. It can fight against brute-force attack, differential attack, and statistical attack efficiently, which also has excellent real-time characteristics.