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Based on Chaotic system's digital Information Encryption Algorithm Research on

Author: LiHaiFen
Tutor: ChenZaiPing´╝ŤDongEnZeng
School: Tianjin University of Technology
Course: Pattern Recognition and Intelligent Systems
Keywords: Chaotic system Hyperchaotic system Image Encryption Video Encryption Runge - Kutta method DSP Security Analysis
CLC: TN918.1
Type: Master's thesis
Year: 2011
Downloads: 46
Quote: 0
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Abstract


With computer technology, network technology and multimedia technology, the rapid development and wide application , for people to access and exchange information to provide a great convenience. However, fully transparent network multimedia information can easily be illegal molecular piracy and tampering. Therefore , how to protect multimedia information security has become a hot topic of international research . This paper studies chaotic signal generation DSP-based , based on hyper-chaotic image encryption and video signal encryption method , specific tasks include: 1 ) understand the concept of chaos , characteristics, studies of several typical chaotic dynamical behavior of the system , the traditional encryption methods , and that the traditional encryption methods exist some problems. 2 ) As in the field of information security chaotic system has broad application prospects , digital chaotic circuit has been chaotic applications of research. This paper presents a three-dimensional chaotic system using the DSPTMS320F2812 achieve digital circuit approach , through the model changes, the method can achieve different chaotic systems digital circuits. The experimental results and computer simulation phase diagram exactly the same , confirming the validity of the method and flexibility. 3 ) A new hyperchaotic system based image encryption algorithm, which scrambling matrix and the diffusion matrix respectively, by Chen chaotic system and hyperchaotic Chen system generated . In the image encryption process, first , the application of scrambling matrix to disrupt the position between the original image pixel ; Then , scrambling with diffusion matrix and the pixel values ??after the XOR operation to change the image pixel value, to the purpose of image encryption . Finally, the experimental results analysis, simulation experiments confirmed that the encryption algorithm has a huge key space and good safety performance. 4 ) In order to solve the video information security issues, this paper proposes a chaotic system based on super- video encryption algorithm, which will stream ciphers and block ciphers combined stream cipher used to generate the random sequence , scrambling data block encryption is used . Stream cipher by the two-dimensional discrete hyperchaotic systems generated block cipher generated by a hyper-chaotic system . And security analysis algorithm , authentication algorithm security.

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