A generalized chaos synchronization based encryption algorithm for sound signal communication

Based on a generalized chaos synchronization system and Sinai map, this paper presents a nonsymmetric digital encryption algorithm for sound communication. This encryption algorithm uses 11 keys, and the secure key space is larger than 2(448). The algorithm has a data origin authentication function. Even though a receiver cannot communicate with the sender of encrypted data, the receiver can still confirm whether the data are altered by an intruder. This algorithm can be applied in Internet sound signal communications. The analysis of the key space, sensitivity of key parameters, and correlation of encrypted signals imply that our encryption algorithm has good security.