Abstract: In order to resolve the problem on current network development and security,the dual network authentication system was proposed,based on singular value decomposition.ID and fingerprints were authenticated via the singular value decomposition watermark technology which combined ID with fingerprints,making ID and fingerprints relatively independent,thus strengthening the concealment and security of ID.Experimental results indicate that the system is stable,safe and reliable.

Key words: digital watermarking； authentication； singular value decomposition；