Chua’s chaotic synchronized system and its main properties are investigated and a multistage chaotic synchronized system for secure communication is proposed. It is shown that the message signal hidden in chaotic drier of the system can be perfectly reconstructed
and the bandwidth
the characteristic of distortion
and the level of security are improved. Examples of speech and still image communication are presented by using the system. level of security are improved.Examples of speech and still image communication are presented by using the system.