ABSTRACT

Digital representation of copyrighted material such as movies, songs, and photographs offer many advantages. However, the fact that an unlimited number of perfect copies can be illegally produced is a serious threat to the rights of content owners. Until recently, the primary tool available to help protect content owners’ rights has been encryption. Encryption protects content during the transmission of the data from the sender to receiver. However, after receipt and subsequent decryption, the data is no longer protected and is freely available.