数字媒体的安全问题随着网络通信的普及,许多传统媒体内容都向数字化转变,并且在电子商务中即将占据巨大市场份额,数字媒体内容的安全问题成了瓶颈问题,制约着信息化进程。虽然成熟的密码学可以解决安全传递和访问控制,但是一旦解密后,数字媒体内容便可以随意被拷贝、传播,这就是 Digital Media Security With the popularity of network communications, many traditional media content to digital change, and will soon occupy a huge market share in e-commerce, digital media content security issues have become a bottleneck, restricting the process of information. Although mature cryptography can solve the security transfer and access control, but once decrypted, digital media content can be copied, spread, which is