一种结合猫映射与Logistic映射的语音加密算法

Novel voice encryption algorithm jointly using cat map and (Logistic) map

将猫映射(catmap)与Logistic映射相结合,构造了一种语音加密算法.该算法首先将语音数据堆叠成二维,然后利用二维猫映射将数据的位置置乱,最后利用一维Logistic映射构造替换表,对数据进行扩散.密码分析表明,该算法具有较高的安全性,能够抵抗统计攻击、差分攻击和已知密文攻击.与传统的DES算法相比,该算法加密速度更快,适用于实时语音加密.

A voice encryption algorithm combining cat map and Logistic map is proposed. The algorithm first piles voice data up into two-dimensional array, then iteratively uses cat map to scramble positions of the data in the array and diffuses the value of each components through a substitution table derived from Logistic map. Cryptanalysis shows that the proposed algorithm is of highly secure in face of many attacks such as differential attacks, known ciphertext attacks, and etc. Comparing with traditional ciphers, for instance, DES, the new algorithm is superior in encryption speed, which makes it suitable for real time application.