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Research and Implementation of Block Cryptography S-Boxes Based on Chaos
Author: TaoTao
Tutor: ZhaoGeng
School: Xi'an University of Electronic Science and Technology
Course: Cryptography
Keywords: Chaotic Mapping S-box Differential uniformity Nonlinearity
CLC: TN918.4
Type: Master's thesis
Year: 2011
Downloads: 68
Quote: 0
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Abstract
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S box is many block cipher algorithm only in the nonlinear components, its password strength decided the password algorithm work safety, the speed of the algorithm determines the scrambling speed. Therefore, a good S box to enhance Feistel structure, SPN structure and the security of cryptographic algorithm IDEA structure plays an important role. The development of the theory of chaos for S box research provides a new way of thinking, the use of chaotic system the excellent characteristics of structure S box became the password the educational world research hot spot. Based on chaotic S box areas for the further research and exploration. On the analysis of the current chaos S box at home and abroad on the basis of construction method, through the iterative chaotic mapping, the initial list repeatedly replacement, this paper proposes a new chaotic S box design scheme, and analyses the S box of nonlinearity and differential uniformity. The results show that the method to design S box difference uniformity is better than the current chaos S box, strong resistance to difference attack and nonlinear attack ability. And on this basis, the design based on spatiotemporal chaos dynamic S box system, use the dynamic S box system image encryption test. Analysis shows that the system output S box has good characteristics of cryptography, and through the image encryption experiment verified the rationality and feasibility of the scheme.
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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Confidentiality of communications and communications security > Password encryption and decryption
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