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Design and Implementation For a Class of Chaotic Encryption Schemes

Author: YuXiaoLong
Tutor: LinYingZhen
School: Harbin Institute of Technology
Course: Computational Mathematics
Keywords: Information Theory Completely confidential program Finite precision Image Encryption
CLC: TP309.7
Type: Master's thesis
Year: 2010
Downloads: 27
Quote: 0
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Abstract


This paper, the Shannon concept of cryptography is completely confidential and chaos cryptography linked to a class of design theory is completely confidential encryption scheme. In this secret program , using a new class of composite maps , proved under the definition of the class is mapped on Devaney chaos , and discusses the mapping of invariant distribution and cryptography features . That the mapping of the symbols generated in a limited divided uniformly distributed sequences are independent , so that the structure is designed such that an encryption encryption scheme theoretically completely confidential . In practical applications , due to the limited accuracy of calculations, such programs can not really be completely confidential. To combat the effects of finite precision , the introduction of a class action makes simple bit encryption scheme in practical application also has a strong anti- deciphering skills. Such actual encryption scheme can be effective against at least a ciphertext-only attack , chosen-plaintext attack. In the analysis of the algorithm , or at least symbolic dynamics attacks against the differential attack. The algorithm has some practical value. This article also discusses the problem of limited accuracy , the establishment of such programs under finite precision implementation model of the finite precision Lyapunov exponents also made a brief discussion . Finally, select a specific type of algorithm image encryption algorithm is applied to the field . Image-based experiments and performance analysis indicates that the encryption algorithm has a higher security.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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