Browse Prior Art Database

Copyright Protection Gateway

IP.com Disclosure Number: IPCOM000021454D
Original Publication Date: 2004-Jan-20
Included in the Prior Art Database: 2004-Jan-20

Publishing Venue

IBM

Abstract

This discloses a method to protect the copyright of the content, especially in wireless environment. While traditional DRM systems use cryptography to protect the contents, our invention only stamp a special stamp (e.g. by watermarking) into the contents, which would let legacy devices to play the contents well. While the stamped contents are forwarded through wireless gateway, the copyright protection gateway would detect the stamp and charge/block this forward.