基于混沌映射的音频加解密算法研究
发布时间:2021-12-27 22:43
随着通信技术的发展,通信内容的信息安全日益重要,国内外相关研究者开展了有关基于混沌系统的动态和无序行为的密码学研究。由于混沌系统具有对初始条件/系统参数的高灵敏度、不稳定行为、高安全性和简单性等突出特点,早已应用于信息或数据,如文本、图像、音频和视频的对称加密。当前在密码学领域中使用的混沌理论,存在着数据冗余、混沌映射非随机,特别是一些语音安全系统使用了一维混沌映射,导致攻击者可以轻松获取混沌映射的初始状态或系统参数,此外一维混沌映射也存在密钥空间小、安全性差等问题,因此开展基于混沌映射的音频加解密算法的相关研究有着实际意义和应用价值。论文首先概述了混沌映射和数字混沌密码的相关理论,构建了一种基于二维非线性映射和一维逻辑映射的耦合混沌系统。该混沌映射具有不同的参数值,并根据一个函数对其轨道进行比较,以产生一个伪随机比特流,该系统防止透露伪随机序列发生器结构中使用的混沌映射的信息。提高了系统的安全性,消除密钥空间小/有限的问题,增加了密钥空间的维数,从而增加了系统的非线性。其次论文阐述了语音的数字化过程、加密解密算法过程、仿真和结果分析。该算法利用混沌迭代生成对称加密密钥,然后对明文进行...
【文章来源】:华中师范大学湖北省 211工程院校 教育部直属院校
【文章页数】:73 页
【学位级别】:硕士
【文章目录】:
中文摘要
ABSTRACT
CHAPTER 1: INTRODUCTION
1.1 Research Background
1.2 Research Status of Encryption and Decryption of Audio with Chaotic Mapping
1.3 Work Content and Innovation
1.4 Structure of this Thesis
CHAPTER 2: PRINCIPLE OF CHAOTIC MAPPING
2.1 Chaotic Dynamics
2.2 Cryptography Based On Digital Chaos
2.3 Henon Map
2.4 Logistic Map
2.5 Pseudo Random Bit Generation
2.6 Conclusion
CHAPTER 3: ENCRYPTION AND DECRYPTION ALGORITHM SIMULATION OF AUDIOWITH CHAOTIC MAPPING BASED ON MATLAB
3.1 Principle of Sound Digitization
3.2 Encryption and Decryption Algorithm Simulation of Audio with ChaoticMapping based on MATLAB
3.2.1 Encryption and Decryption Algorithm of Audio with Chaotic Mappingbased on MATLAB
3.2.2 Result Analysis
3.3 Conclusion
CHAPTER 4: ENCRYPTION AND DECRYPTION APPLICATION OF AUDIO WITH CHAOTICMAPPING
4.1 Background of Audio Encryption and Decryption application
4.2 Application Design of Encryption and Decryption About Audio with ChaoticMapping
4.3 Experiment
4.4 Result and Discussion
4.5 Conclusion
CHAPTER 5: CONCLUSION AND PROSPECT
5.1 Conclusion
5.2 Prospect
REFERENCES
ACKNOWLEDGEMENT
PUBILISED PAPER
LIST OF ACRONYMS
APPENDIX
中文摘要
【参考文献】:
期刊论文
[1]混沌前馈型流密码的设计[J]. 周红,俞军,凌燮亭. 电子学报. 1998(01)
本文编号:3552880
【文章来源】:华中师范大学湖北省 211工程院校 教育部直属院校
【文章页数】:73 页
【学位级别】:硕士
【文章目录】:
中文摘要
ABSTRACT
CHAPTER 1: INTRODUCTION
1.1 Research Background
1.2 Research Status of Encryption and Decryption of Audio with Chaotic Mapping
1.3 Work Content and Innovation
1.4 Structure of this Thesis
CHAPTER 2: PRINCIPLE OF CHAOTIC MAPPING
2.1 Chaotic Dynamics
2.2 Cryptography Based On Digital Chaos
2.3 Henon Map
2.4 Logistic Map
2.5 Pseudo Random Bit Generation
2.6 Conclusion
CHAPTER 3: ENCRYPTION AND DECRYPTION ALGORITHM SIMULATION OF AUDIOWITH CHAOTIC MAPPING BASED ON MATLAB
3.1 Principle of Sound Digitization
3.2 Encryption and Decryption Algorithm Simulation of Audio with ChaoticMapping based on MATLAB
3.2.1 Encryption and Decryption Algorithm of Audio with Chaotic Mappingbased on MATLAB
3.2.2 Result Analysis
3.3 Conclusion
CHAPTER 4: ENCRYPTION AND DECRYPTION APPLICATION OF AUDIO WITH CHAOTICMAPPING
4.1 Background of Audio Encryption and Decryption application
4.2 Application Design of Encryption and Decryption About Audio with ChaoticMapping
4.3 Experiment
4.4 Result and Discussion
4.5 Conclusion
CHAPTER 5: CONCLUSION AND PROSPECT
5.1 Conclusion
5.2 Prospect
REFERENCES
ACKNOWLEDGEMENT
PUBILISED PAPER
LIST OF ACRONYMS
APPENDIX
中文摘要
【参考文献】:
期刊论文
[1]混沌前馈型流密码的设计[J]. 周红,俞军,凌燮亭. 电子学报. 1998(01)
本文编号:3552880
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