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A Spatiotemporal-Chaos-Based Cryptosystem Taking Advantage of Both Synchronous and Self-Synchronizing Schemes

Chinese Physics Letters 2004年第6期21卷 1016-1019页

作者： LǖHua-Ping WANGShi-Hong LIXiao-Wen TANGGuo-Ning kuangjin-yu YEWei-Ping HUGang DepartmentofPhysics BeijingNormalUniversityBeijing100875 DepartmentofElectronics BeijingNormalUniversityBeijing100875 TheKeyLaboratoryofBeamTechnologyandMaterialModificationofMinistryofEducation BeijingNormalUniversityBeijing100875

Two-dimensional one-way coupled map lattices are used for cryptography where multiple space units produce chaotic outputs in parallel. One of the outputs plays the role of driving for synchronization of the decryption system while the others perform the function of information encoding. With this separation of functions the receiver can establish a self-checking and self-correction mechanism, and enjoys the advantages of both synchronous and self-synchronizing schemes. A comparison between the present system with the system of advanced encryption standard (AES) is presented in the aspect of channel noise influence. Numerical investigations show that our system is much stronger than AES against channel noise perturbations, and thus can be better used for secure communications with large channel noise.

关键词： Spurious signal noise

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A Spatiotemporal－Chaos－Based Encryption Having Overall Properties Considerably Better than Advanced Encryption Standard

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Communications in Theoretical Physics 2003年第1X期40卷 57-61页

作者： WANGShi-Hong YEWei-Ping LOHua-Ping kuangjin-yu LIJing-Hua LUOyun-Lun HUGang ScienceSchool BeijingUniversityofPostsandTelecommunicationsBeijing100876China DepartmentofElectronics BeijingNormalUniversityBeijing100875China DepartmentofPhysics BeijingNormalUniversityBeijing100875China TheKeyLaboratoryofBeamTechnologyandMaterialModificationofMinistryofEducation BeijingNormalUniversityBeijing100875China

Spatiotemporal chaos of a two-dimensional one-way coupled map lattice is used for chaotic *** chaotic outputs of many space units are used for encryption simultaneously. This system shows satisfactory cryp-tographie properties of high security, fast encryption (decryption) speed, and robustness against noise disturbances in communication channel. The overall features of this spatiotemporal-chaos-based cryptosystem are better than chaotic cryptosystems known so far, and also than currently used conventional cryptosystems, such as the Advanced Encryption Standard (AES).

关键词：混沌同步时空混沌保密通讯加密通信安全

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