Authors
Abstract
Providing ownership on relational database is a crucial issue in today
internet-based application environments and in many content distribution
applications.This paper provides the effective watermarking technique to protect
valuable numeric relational data from illegal duplications and redistributions as
well as to claim ownership,the robustness of proposed system depending on using
new hybrid techniques ,first technique MAC(Message Authentication Code) that
used one way hash function SHA1 ,second technique is threshold generator base
on simple combination of odd number of register and by using secret key in
proposed system. Detecting the watermark neither requires access to neither the
original data nor the watermark. The watermark can be detected even in a small
subset of a watermarked relation as long as the sample contains some of the marks.
The finally stage is the analysis of technique that used, our extensive analysis
shows that the proposed technique is robust against various forms of malicious
attacks and updates to the data
Keywords
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