Traitor tracing for xml documents

Abstract

Electronic documents are more easily copied and redistributed than paper documents. This is a major impediment to electronic publishing. One needs to think of various copy protection schemes for the documents. There are various schemes existing for the protection of document from unauthorized users. Copy protection is very much required, once the authorized user has an access to the document. Out of two approaches, copy prevention and copy avoidance, work is done to make it difficult for the user to illegally copy the document. This effort is to make the document at least as secure as paper document. The focus is on text documents and especially XML documents. Traitor tracing is the scheme where an authorized user is caught as a traitor. This is the domain where out of lot many authorized users; traitor has to be traced. Putting invisible marks in the document, unique for each user, i.e. fingerprinting the document is one of the techniques used to trace the traitor. Many proposals have already been made in this direction, but each deals with images and music files. A proposal is made to protect XML documents using fingerprinting. This is the Novel idea for working directly on text documents.