• Manoj Kumar
• O.P.Verma

Database Watermarking methods are used for security and copyright protection of relational databases. Many techniques have been popular for watermarking multimedia digital assets like images, audio, video, text etc. Methods used for these objects are usually not applicable with numerical database, because to insert a watermark into a data, small error is created in data, called mark. An error in relational data is usually not acceptable, so a different approach need to be develop to create a mark into the numerical database. Many different approaches have been discussed in previous researches for relational database watermarking. This paper explores enhancing security with multiple watermarking on a given database. Additionally it suggest a solution to the problem of copyright claim when more than one entities claim ownership of same database. In case both claimant have inserted their own watermarks, it is possible to extract both watermarks and decide which watermark was inserted first. The scheme can be applied to any existing database watermarking algorithms but a flexible algorithm is suggested for observing effects of multiple watermarking.

database copyright, digital watermarking, watermark embedding

"MULTIPLE WATERMARKING OF RELATIONAL DATABASES AND OWNERSHIP CLAIM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.1006-1011, August-2018, Available :http://www.jetir.org/papers/JETIRA006176.pdf

"MULTIPLE WATERMARKING OF RELATIONAL DATABASES AND OWNERSHIP CLAIM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp1006-1011, August-2018, Available at : http://www.jetir.org/papers/JETIRA006176.pdf