基于改进Henon映射和超混沌的双重语音加密算法

doi:10.11959/j.issn.1000-0801.2021271

摘要/Abstract

摘要：

针对现有语音混沌加密算法密钥空间小、安全性差、加密效率低且无法实现密钥复杂度与加密效率的权衡等问题，提出了一种改进Henon映射和超混沌的双重语音加密算法。首先，为了使Henon映射具有更大的混沌空间和更高的混沌复杂度，通过扩展控制参数范围将非线性三角函数作为输入参数变量等手段对经典Henon映射进行了改进；其次，利用改进的Henon映射生成伪随机序列，并对语音数据进行单次不重复置乱加密，获得语音数据的初次加密结果；最后，利用Lorenz超混沌系统对初次加密后的语音数据进行Arnold二次置乱加密和异或扩散加密，获得最终的密文语音数据。实验结果表明，与现有方法相比该算法具有更大的密钥空间和更高的加密效率，且对各种密码攻击拥有更好的鲁棒性。

关键词: 语音加密, 改进的Henon映射, Lorenz超混沌系统, Arnold变换, 鲁棒性

Abstract:

Aiming at the problems of small key space, poor security, low encryption efficiency, and the inability to realize the trade-off between key complexity and encryption efficiency of existing speech chaotic encryption algorithms, a dual speech encryption algorithm based on improved Henon mapping and hyperchaotic was proposed.Firstly, the traditional Henon mapping was improved by extending the control parameter range and taking the nonlinear trigonometric function as the input parameter variable, which made the Henon mapping have larger chaotic space and higher chaotic complexity.Secondly, the improved Henon mapping was used to generate pseudorandom sequence, and the speech data was encrypted single time without repeated scrambling to obtain the first time encryption results of the speech data.Finally, Lorenz hyperchaotic system was adopted to encrypt the speech data after the first time encryption by Arnold secondary scrambling encryption and XOR diffusion encryption to obtaining the final ciphertext speech data.The experimental results show that, compared with the existing methods, the proposed algorithm have larger key space, higher encryption efficiency, and stronger robustness against various cryptographic attacks.

Key words: speech encryption, improved Henon mapping, Lorenz hyperchaotic system, Arnold transform, robustness

中图分类号:

TP309

张秋余, 宋宇杰. 基于改进Henon映射和超混沌的双重语音加密算法[J]. 电信科学, 2021, 37(12): 11-24.

Qiuyu ZHANG, Yujie SONG. A dual speech encryption algorithm based on improved Henon mapping and hyperchaotic[J]. Telecommunications Science, 2021, 37(12): 11-24.

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语音类型	语音长度/s	语音格式
语音1	2	WAV
语音2	4	WAV
语音3	5	WAV
语音4	8	WAV
语音5	9	WAV
语音6	10	WAV

语音类型	初次加密PESQ-MOS	初次解密PESQ-MOS	双重加密PESQ-MOS	双重解密PESQ-MOS
语音1	0.468 0	4.500 0	0.379 1	4.500 0
语音2	0.717 6	4.500 0	0.705 6	4.500 0
语音3	0.743 1	4.500 0	0.834 1	4.500 0
语音4	0.841 9	4.500 0	0.875 1	4.500 0
语音5	0.924 1	4.500 0	0.786 3	4.500 0
语音6	0.903 1	4.500 0	0.817 1	4.500 0
平均值	0.766 3	4.500 0	0.732 9	4.500 0

语音类型	初次加密SNR/dB	初次加密PSNR/dB	双重加密SNR/dB	双重加密PSNR/dB
语音1	-10.244 1	1.966 9	-40.154 0	0.329 4
语音2	-18.161 1	1.770 9	-38.488 3	0.001 3
语音3	-11.645 1	1.610 6	-51.026 1	0.066 9
语音4	-29.952 2	1.914 7	-47.490 0	0.074 3
语音5	-26.524 1	1.733 5	-55.538 2	0.139 3
语音6	-22.541 9	1.467 6	-36.400 2	0.092 4
平均值	-19.844 5	1.744 0	-44.849 5	0.117 3

语音类型	原始语音＆初次加密语音	原始语音＆初次解密语音	原始语音＆双重加密语音	原始语音＆双重解密语音
语音1	0.004 696	1.000 0	0.000 206	1.000 0
语音2	-0.004 204	1.000 0	-0.002 372	1.000 0
语音3	0.001 067	1.000 0	0.003 819	1.000 0
语音4	0.003 373	1.000 0	-0.002 120	1.000 0
语音5	-0.009 487	1.000 0	-0.000 388	1.000 0
语音6	-0.000 970	1.000 0	-0.003 338	1.000 0
平均值	0.005 566	1.000 0	0.002 041	1.000 0

语音类型	原始语音/dB	初次加密/dB	双重加密/dB
语音1	11.604 1	11.604 1	15.266 9
语音2	11.750 0	11.750 0	15.418 6
语音3	12.219 0	12.219 0	15.579 0
语音4	10.874 5	10.874 5	15.657 8
语音5	11.092 6	11.092 6	15.418 6
语音6	11.913 4	11.913 4	15.427 4
平均值	11.575 6	11.575 6	15.461 4