摘要
针对低维Hénon映射混沌在加密时存在混沌空间小、安全性低等问题,提出了改进的3D-Hénon混沌映射音频加密算法。首先通过对二维Hénon混沌映射进行升维与改进,得到改进的3D-Hénon混沌映射,并与离散化的超混沌系统结合,生成伪随机序列;通过NIST sp800_22测试检验序列随机性,将秘钥与明文音频互相关联,实现了“一次一密”,降低了选择明文攻击的可能性;利用生成的伪随机序列进行循环排序置乱,以及向前向后扩散完成加密。通过仿真与抗攻击性实验表明,本文提出的音频加密算法具有较强的秘钥敏感性和足够大的秘钥空间,相邻振幅间相关性较低,与明文音频的峰值信噪比较低,该算法具有良好的抗统计攻击性以及鲁棒性。
Aiming at the problems of small chaotic space and low security in the encryption of low-dimensional Hénon map chaos,an improved audio encryption algorithm based on 3 D-Hénon chaotic map is proposed.The pseudo-random sequence generated by the Hénon chaotic map combined with the discretized hyper-chaotic system,and the randomness of the sequence is verified by the NIST sp800_22 randomness test,and the secret key and the plaintext audio are correlated to each other.Select the possibility of plaintext attack,use the generated pseudo-random sequence to perform circular sorting scrambling and forward and backward diffusion to complete encryption.Simulation and anti-attack performance experiments show that the proposed audio encryption algorithm has strong key sensitivity and The key space is large enough,the correlation between adjacent amplitudes is low,and the peak signal-to-noise ratio of plaintext audio is low.The encryption algorithm has good resistance to statistical attacks and robustness.
作者
妥永强
巫朝霞
TUO Yongqiang;WU Zhaoxia(School of Statistics and Data Science,Xinjiang University of Finance and Economics,Urumqi 830012,China)
出处
《智能计算机与应用》
2022年第3期53-60,共8页
Intelligent Computer and Applications
基金
国家自然科学基金(61941205)
关键词
音频加密
峰值信噪比
鲁棒性
循环排序置乱
audio encryption
peak signal to noise ratio
robustness
circular sort scrambling
