The Research Of Speech Encryption Technique Based On Chaos Synchronization Theory

Chaos is a special movement which follows the dynamic mechanism,random and rich connotation.With the development of chaos,chaos encryption communication is increasingly attracted the attention.In the area of Internet,voice communication technology has become one of the core network technologies;meanwhile the attacks at voice are great threats to voice communication.This article based on the large number of domestic and international literatures,according to features of voice signal,three kinds of synchronize technologies are analyzed and compared,and a kind of synchronize method is chosen to voice communication.The paper proposed a switching encryption program which can encrypt and decrypt voice securely and accurately,especially in the high-power voice signals.Then map chaos is applied in the program,and the results test the feasibility of the program.At last a new chaos system which is fit to the speech is constructed.The applications of the new system in chaos masking and switching verify the advantages of the new system.