Digital Right Management Model Based on Cryptography and Digital Watermarking

This paper proposes a Digital Right Management model using both cryptography and digital watermarking technology integratively. This model encrypts digital content with high-performance symmetric key, and uses robust watermarking and fragile watermarking separately to embed copyright information, license encrypted with machine fingerprint and integrity mark into the digital content sequentially according to different purpose. This model can be used not only in the detection of copyright information of digital content, but also in copyright control and tracking illegal distribution. It avoids some flaws brought by only depending on cryptography or digital watermarking, and has certain practical utility.