However, such techniques are usually not robust against malicious attacks and do not provide any mechanism to selectively watermark a particular attribute by taking into account its role in knowledge discovery. Reversible watermarking is employed to ensure data quality along- with data recovery. When ownership rights are enforced using watermarking, the underlying data undergoes certain modifications as a result of which, the data quality gets compromised. Watermarking is advocated to enforce ownership rights over shared relational data and for providing a means for tackling data tampering. These databases are used effectively in collaborative environments for information extraction consequently, they are vulnerable to security threats concerning ownership rights and data tampering. Advancement in information technology is playing an increasing role in the use of information systems comprising relational databases. RRW-A Robust and Reversible Watermarking Technique for Relational Data.
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