一种新颖的水印密钥系统

水印技术作为一种有效的信息隐藏方法,发展得非常迅速.大部分水印系统都只具有一把私钥,而且不能公开,但是在某些应用中需要公钥来恢复水印.如何保证公钥的产生不会影响私钥的性能,是水印密钥系统的关键问题.构造了一种水印密钥系统,提出了一种新颖的公钥生成方法.无须原始数据即可利用公钥恢复嵌入的标识符.由于公钥的产生只涉及部分水印信息,从而成功地解决了公钥生成与私钥之间的矛盾.实验结果表明,该系统是安全、有效的.

A Novel Secret Key Watermarking System

Watermarking, as an effective method for information hidding, has evolved very quickly. Most watermarking systems available have only a secret key, which cannot be public. But in some applications, watermarking needs to be retrieved by public keys. How to generate public keys without weaken the performance of the private key is a key problem. In this paper, a secret key watermarking system is designed, in which a novel method of generating public keys is proposed. The identifier (ID) embedded can be reliably retrieved using public keys without resorting to the orginal data. Because only part of embedding information is used in public keys, the above problem is successfully solved. Expeimental results show its security and validity.