基于ZUC与DWT-SVD的交换加密水印算法

Commutative encryption and watermarking algorithm based on ZUC and DWT-SVD

为了有效解决多媒体数据在传输、存储过程中的安全及版权保护问题,提出基于祖冲之序列密码算法(ZUC)与离散小波变换—奇异值分解(DWT-SVD)的交换加密水印算法。该算法基于奇异值不变性,将水印嵌入到奇异值中,通过ZUC算法分别对奇异值矩阵集合、奇异矩阵集合置换加密。水印嵌入操作与加密操作的先后顺序不影响含水印密文的生成,且从含水印密文和解密后的明文中都能提取完整的水印。实验表明,水印的不可见性较好,算法有较高的安全性并具有一定的鲁棒性。

In order to effectively solve the problems of multimedia data security and copyright protection in the process of transmission and storage,this paper proposed a commutative encryption and watermarking algorithm based on Zu Chongzhi(ZUC)stream cipher algorithm and DWT-SVD.Based on the invariance of the singular value,the algorithm embedded the watermark into the singular value,and used the ZUC algorithm to permutate and encrypt the set of the singular value matrix and the set of the singular matrix respectively.The sequence of embedding operation and encryption operation did not affect the generation of the watermarked ciphertext,meanwhile,both watermarked ciphertext and decrypted plaintext can extract watermark completely.The experimental results show that the watermark has good invisibility,and the algorithm has high security and a certain robustness.