A speech chaotic encryption algorithm based on network

Considering chaotic synchronization, the TCP protocol is usually adopted to transport encrypted data on networks at present. A block encryption algorithm is proposed to digital speech codes in this paper. The method uses the UDP protocol to cipher text. It partially solves the problem of decryption for receiver when some data packages are lost during transportation. It encrypts message with chaotic sequences which randomly come from chaos model database, so the randomness of chaotic sequence is enhanced greatly. Furthermore, it can overcome the disadvantages of short period when data amount is great. The algorithm is testified with testing program written by the authors.