An online chaotic image secure communication system with the encryption/decryption method of grey value substituting and position shuffling is designed and implemented for the network,which is real-time and secure for communications.By the use of the Lorenz and Logistic chaotic systems, with a key synchronization scheme, the original image information can be encrypted in a real-time way and the cipher information is transmitted via TCP.With the properties of randomness and its sensitivity on the initial conditions, the encrypted transmitting messages are secure and difficult to be eavesdropped.The implementation method of the system is studied, and the communication results show its security and practicability.%本文利用像素值替代和图像位置置乱相结合的方法进行图像信息的加解密,设计并实现了一个网络在线混沌图像保密通信系统,具有保密性和实时性.系统采用Lorenz和Logistic混沌系统,通过密钥同步方案,信息被实时加密后经TCP协议传输;由于混沌映射的初值敏感性和伪随机特性,传输的信息很难被破译,具有较强的保密性.本文对系统的实现方法进行了研究,通信结果表明该系统具有较好的保密性和实用性.
展开▼
