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Chaotic cryptanalysis and applied research

Author: JinHaiRong
Tutor: DingQun
School: Heilongjiang University
Course: Signal and Information Processing
Keywords: Information Security Chaotic Stream Cipher Cryptanalysis Correlation Attack
CLC: TN918.1
Type: Master's thesis
Year: 2009
Downloads: 174
Quote: 4
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Abstract


With computer communication technology and the information society the rapid development of Internet technology , information security has become a hot issue all areas of society , cryptography as its basic techniques have also been widespread concern. Chaos is a nonlinear dynamical system-specific form of exercise , with certainty , sensitivity to initial conditions and long-term unpredictability and other safety features, and cryptography it is a natural link between . This paper studies chaotic stream cipher analysis and system design applications , specifically including the following: 1 . Based on chaos theory are discussed . Definition and description of chaotic motion characteristics , focusing on analysis Lyapunov exponent, as well as several common chaotic attractor situation, and current developments in chaotic cryptography analyzed and summarized . 2 constructed from the password and the attacker two angles cipher analysis , the former from the information entropy, correlation and analysis of key space three angles , which focus on using divide and conquer correlation attack method using a linear feedback shift analysis of the structure of registers . 3 emphatically analyzed Logistic chaotic map Lyapunov exponent characteristics discussed by the Logistic chaotic sequence generated chaotic mapping performance in finite precision fixed parameters and case studies Logistic cryptographic system cycle estimation methods to solve the current chaotic sequence cipher system application cycle is difficult to estimate the problem . 4 discusses the chaotic stream cipher applications, and on this basis, the design of the new encryption system , the encryption system combines the Logistic chaotic sequence and standard cryptographic algorithm A5 / 1, sequence analysis of experiments show that the password meets the application requirements of stream ciphers , which program easily implemented in hardware , can be downloaded to the FPGA chip, it has been applied in practice .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Confidentiality of communications and communications security > Theory
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