关键词: 多混沌系统, 流密码, 加密

Abstract: 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.

Key words: multi-chaotic system, stream cipher, encryption