Secure Communication Systems Based on Cryptography and Chaos

• Main Authors: Wu Dong Shiuah, 吳東軒
• Other Authors: Yu Gwo Ruey
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/50076654715547186191

碩士 === 義守大學 === 電機工程學系 === 91 === Identification of logistic map, design of synchronization control, and applications of communication security with cryptography, are presented in this thesis. To reduce the errors of identification and prediction, genetic algorithms and neural networks are applied to search the globally optimal weight and bias by means of reproduction, crossover, and mutation. Then, using fuzzy logic and adaptive network-based fuzzy inference system, the chaos synchronization of logistic map is designed and applied to the encryption of voice and picture. With the help of IDEA and chaos synchronization, the encrypted logistic map is developed. Computer simulations demonstrate the proposed scheme can make sure the security of communications.