A Four Stages Protocol Designed to Protect Copyright in Digital Museum

Copyright protection of digital works is a serious problem today. It is worthy to research on how to use watermarking algorithm correctly according to special application. A secure watermarking protocol is designed in this paper to protect the copyright in digital museum. In our cryptography based protocol, a trusted third party is introduced into the system, and two watermarks are embedded into the host data independently through four stages information exchange and authentication. Different with the protocol described in [12] and [13], our scheme has no watermarking algorithm restriction. The innocent will not be framed, and the culpable will not be denied with the help of cryptographic evidence. Together with watermarking algorithm, the protocol gives a useful way to protect copyright in digital museum.