基于数字水印的点对点流媒体内容保护

摘要

点对点(P2P)流媒体系统面临污染及篡改攻击、版权保护等安全问题,但P2P流媒体视频本身的特点使信息摘要、数字签名等常见的安全技术并不适用.为此,提出一种既符合P2P流媒体视频特性,又基本满足防污染、防篡改以及保护版权需求的数字水印技术,并以MPEG-2编码为例给出算法及实现过程.通过实验验证,该方法在安全、高效、完整、不可见等方面均达到设计要求.%The Peer-to-Peer(P2P) streaming video faces serious security problems such as pollution, tampering attacks and copyright protection,but due to the characteristics of the P2P streaming system, the usual security technologies, such as message digest and digital signature, are not fit for it. So, a new digital watermark is designed, which can satisfy the need of anti-pollution attack, anti-modification attack and providing copyright protection as well as suit for the characteristics of the P2P streaming system. After giving the detail algorithm, experiments show that the digital watermark achieves the goals of design in security, efficiency, integrity and transparency.