Digital text watermarking: secure content delivery and data hiding in digital documents

Secure communication of data over public channel is one of the most important challenges. Both the activities to secure contents and to break security are very hot. In order to reduce the chances of attack, security need to be made invisible. Need to preserve originality, ownership information and integrity of text documents in a way that cannot be identified by every one is being felt badly. Watermarking of the documents is a step towards achieving these objectives. However to watermark a plain text document (ASCII) in a way that original text is not changed and it would be very difficult to break it, is a great challenge. We have developed a novel encoding scheme, which can be used to insert information in a plain text without changing the text. A system has been developed based upon this encoding scheme. This paper describes the system and demonstrates its working.