摘要
针对音频信号文件冗余度高、数据量大、相关性强,以及传统加密方法不能满足当前高效实时安全性的需要,本文应用图像加密的思想,提出将一维数字音频信号转化二维“声图”信息,并借助Arnold变换和DRPE技术对其进行双重加密,达到即使部分密文数据缺失仍然能够恢复音频信号,并且又可以破坏原始信号数据间相关性的目的;此外,DRPE采用加密无理数序列构建随机相位板,增加了密钥空间,进一步提高了加密信息的安全性,同时,这种加密能够通过图形比较更直观地评判加密效果,避免了对音频解密信号质量评判时存在的主观方法受人为因素影响大和客观方法复杂且不能完全反映听觉效果的缺陷。实验结果证明,该加密方案对密文信息剪切、加噪、滤波等攻击具有很强的鲁棒性。
In view of the high redundancy of audio signal files,the large amount of data,and the strong correlation,traditional encryption methods cannot meet the needs of the current high-efficiency real-time security.In this paper,the idea of image encryption is applied to propose the conversion of one-dimensional digital audio signals into two-dimensional“sound map”information.With the help of Arnold transform and DRPE technology,it is double-encrypted to achieve the purpose of restoring audio signals even if part of the cipher text data is missing,and it can also destroy the correlation between the original signal data.In addition,DRPE encryption uses a random phase plate constructed by irrational number sequences to increase the key space and further improve the security of encrypted information.At the same time,this kind of encryption can judge the effect of encryption more intuitively,and avoid the subjective method that exists when evaluating the quality of audio decryption signal is greatly influenced by human factors.The objective method is complex and cannot fully reflect the defects of the auditory effect.The experimental results show that the encryption method is robust to clipping,noise,filtering and other attacks of cipher text information.
作者
刘效勇
卢佩
史芹
邵建新
张永才
孙迪
Liu Xiaoyong;Lu Pei;Shi Qin;Shao Jianxin;Zhang Yongcai;Sun Di(College of Science,Shihezi University,Shihezi,Xinjiang 832003,China;College of Information Science and Technology,Shihezi University,Shihezi,Xinjiang 832003,China;Teachers College,Shihezi University,Shihezi,Xinjiang 832003,China)
出处
《石河子大学学报（自然科学版）》
CAS
北大核心
2019年第3期389-396,共8页
Journal of Shihezi University(Natural Science)
基金
国家自然科学基金(61841111)
关键词
ARNOLD变换
双随机相位编码技术
声图
鲁棒性
Arnold transformation
double random phase encoding technique
sound map
robustness
