• Sharafunisa S
• Smitha E S

Nowadays internet is providing many web based ser-vices such as digital repositories, libraries and e-commerce etc. For using these applications the digital information such as image, audio, video, relational data are made publicly available. So there is a need to protect these digital assets from various threats like ownership claiming, piracy, theft etc. Watermarking is a solution to overcome these issues. Using watermark we can implement both tamper protection and ownership proof. Encryption is also a possible solution, but the encrypted data cannot be used for data mining applications and ownership protection cannot be achieved. The watermarking techniques encode the data in such a manner that it remains useful for recipients. The data owner watermark the data and decodes later if required when, ownership proof is required. The recipient can also get valuable information from the watermarked data without need for any pre-processing. This paper presents review on some of the watermarking technique for relational database.

Watermark, Genetic Algorithm (GA), Prediction Error Expansion (PEE), Difference Expansion Watermarking (DEW),Reversible and robust watermarking (RRW).

"A Review on Watermarking Techniques for Relational Data", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.3, Issue 6, page no.238-240, June-2016, Available :http://www.jetir.org/papers/JETIR1606038.pdf

"A Review on Watermarking Techniques for Relational Data", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.3, Issue 6, page no. pp238-240, June-2016, Available at : http://www.jetir.org/papers/JETIR1606038.pdf