Abstract: Through the analysis of the research situation of recent information resource copyright protection of digital li- brary, this paper points out that the existing copyright protection technology can not work well on a tampered digital product for tampering location, recovering of tampered content and restoring of origin product. At same time, tampering can result in a failure for digital product authentication due to that the extracted watermarking is not correct. To solve these problems, a method of lossless authentication using the newest compressed sensing theory and intelligent reversible watermarking technology is presented to realize the copyright protection of information resource of digital library.

Key words: digital library; information resource; copyright protection; lossless authentication