基于祖冲之交换加密水印算法的研究

可交换加密数字水印(CEW)是一种密码和数字水印相结合的技术,用于多媒体信息安全和版权方面的保护.为了保证载体数据的安全性,提出了基于祖冲之(ZUC)的交换加密水印算法.算法采用ZUC序列密码产生密钥,对载体信息进行模运算加密,水印嵌入操作与数据加密操作的先后顺序,不影响含水印密文数据的产生;在提取水印时,可以实现密码和水印操作的交换.实验表明,密文域提取的水印与明文域提取水印一致,含水印图像的质量高,加解密和水印嵌入提取效率更高,且算法具有一定的鲁棒性.

Research on commutative encryption and watermarking algorithm based on ZUC

Commutative encryption and watermarking(CEW) is a combination of cryptographic and digital watermarking technology, which is used for multimedia information security and copyright protection. In order to ensure the security of carrier data, this paper proposed an exchange encryption watermarking algorithm based on ZUC. The algorithm used the ZUC sequence cipher to generate the key and used modular operation to encrypt the carrier information. The sequence of watermark embedding operation and data encryption operation did not affect the generation of watermark ciphertext data. When extracting the watermark, the algorithm could realize the exchange of password operation and watermark operation. The experimental results show that the watermark extraction in ciphertext domain is consistent with that in plaintext domain, the image containing watermark is of high quality, the efficiency of encryption and decryption, watermark embedding and extraction are higher, and the algorithm has a certain robustness.