Study Of Chaos Synchronization Theory And Its Application In Image Secure Communication

With continuous improvement of social information communication requirements,various communication means are upgraded constantly, and people also pay more and moreattention to the information confidential transmission. The traditional secure communicationmodes are far from meeting the communication performances of modern digital information.According to this domestic and foreign front topic of chaotic secure communication, thisdissertation conducts in-depth research from different angles, and the innovation creations arethat it proposes one new chaos synchronization secure communication schemes: FM-CDSK,this kind of communication system performances is studied deeply and analysed bysimulation in this dissertation. It is verified that this kind of communication system in variouscommunication performances is better than existing chaotic secret communication systems.First, this dissertation has simulated the definitions of several typical chaotic system andmovement characteristics, and proceeded theoretical analysis and simulation for several keychaotic synchronization methods. Then, it compared the chaos masking securecommunication system performances of single stage non-feedback and single stage feedback.At last, this dissertation proceeded simulation and comparative analysis BER、synchronous transmission time and channel safety of chaos parameter modulation and allkinds of existing chaos shift keying secure communication systems. Meanwhile, itsummarized the advantages and disadvantages of various communication schemes. Then, inview of these defects, the dissertation proposed the new kind of chaotic securecommunication scheme——FM-CDSK system, and the simulation experiments verify thesuperiority of their communication performances.