DATABASE WATERMARKING USING BEZIER CURVES

Abstract

Digital Watermarking has been widely applied to relational database for ownership protection and information hiding. Digital watermarking for databases emerged as a candidate solution to provide copyright protection, tamper detection, traitor tracing, maintaining integrity of database. But robustness is a big challenge due to frequently database maintaining operators on those tuples. Here, we present an effective watermarking technique for relational database that is robust against various attacks. We present an approach which embeds a cubic curve into the database. To accommodate the cubic curve the original database is slightly modified by the embedding algorithm to obtain the watermarked database. The proposed system creates a cubic curve according to the parameters provided and then hides the cubic curve in the database by using an embedding algorithm. Embedding algorithm utilizes a parameter alpha and a key, which provides control for the hiding and recovery processes, restricting detection by those who do not possess the key, or do not have access to it.