机构地区: 深圳大学信息工程学院
出 处: 《深圳大学学报(理工版)》 2004年第1期24-29,共6页
摘 要: 数字指纹技术是将不同的水印嵌入到不同的拷贝中,使跟踪参与盗版的用户成为可能.数字水印技术的关键是防盗版者们的共谋估计.作者对Dittmann提出的一种抗共谋攻击的数字图像指纹算法加以改进,使之适用于数字视频.改进后的算法降低了原有算法对大量标注位置的依赖,改善了拷贝容量,能贴近实际应用需求.实验数据显示,改进后的算法切实可行. Embedding unique customer identification as a watermark into multimedia data is called digital fingerprinting, which makes it possible to trace the illegal usages of pirates. The serious problem in digital fingerprinting is collusion attack. In this paper, an improved scheme is proposed based on Dittmanns collusion-secure digital fingerprinting for digital images. This proposed scheme reduces the dependence on mass marking positions, which guarantees the ability of collusion-secure in Dittmanns algorithm. Therefore the capacity of possible copies is increased significantly to the level of practical application. The experiments show that this proposed scheme is practical.