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Studies on the Design and Implementation of Two Dimension Hyper Chaotic Stream Ciphers

Author: WuWei
Tutor: LiXin
School: Ocean University of China
Course: Communication and Information System
Keywords: Two - dimensional hyperchaotic Stream ciphers Chaotic sequence generator DSP Builder FPGA
CLC: TN918.1
Type: Master's thesis
Year: 2008
Downloads: 136
Quote: 1
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Abstract


With the rapid development of communication technology and network technology and extensive application in today's information age, more and more information is transmitted over the network, information security and protection becomes increasingly important, the theory of cryptography technology information Science and technology is an important area of ??research. In recent years, many researchers found that there are inherent close contact between chaos and cryptography. Chaotic systems are extremely sensitive to initial conditions, can produce excellent cryptography performance with random-like, relevance, complexity and wide spectrum sequence provides a new and effective means for data encryption. But chaotic cryptography as an emerging cross-disciplinary, it is still in the early stages of development. Although there have been many chaotic encryption scheme proposed, but not yet fully mature chaotic cryptography. This study is in this context, the chaotic maps can be applied to chaotic cryptosystem, chaotic sequence cryptosystem for chaotic random number generator to generate a key and other key issues were discussed. First of all, We introduce the basic theory of the chaos of modern cryptography, one-dimensional Logistic mapping, for example, discussed in detail describe the chaos of the main characteristics and the basic characteristics; analyzed from low-dimensional to three common typical of high-dimensional the characteristics of the chaotic system; focuses on the basic principles of stream ciphers, methods, features. For one-dimensional chaotic encryption algorithm key space, security is not high defect This selection of Logistic map coupling to generate two-dimensional chaotic system as the research object, the focus of the study on the super-chaotic sequence in the application of data encryption to chaotic data encryption algorithm to make some useful efforts and attempts, and hyperchaotic applied research in data encryption at the same time to do some exploring. Then, using a fast FPGA development environment for DSP Builder Altera Corporation launched as a design tool, digital system design in this environment. , The use of the tool in the analysis of the current chaotic sequence generator hardware implementation method based on two-dimensional super-chaotic sequence generator modeling design. Simulation analysis shows that the method greatly simplifies the hardware implementation process, has opened up a new DSP processor and system design methodology for the design of DSP processing chip with independent intellectual property meaningful attempt. Finally, continue in-depth research work envisaged.

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