A Blind Reversible Robust Watermarking Scheme for Relational Databases

Table 1

Notations used in our scheme.

Parameters	Descriptions
𝑅	Database relation to be watermarked
𝑅𝑊	Watermarked relational database
𝐴𝑗	Attribute 𝑗 in relational database 𝑅
𝑛	Number of tuples in relational database 𝑅
PP𝑖	The 𝑖th peak point of the histogram
CZP𝑖	The 𝑖th closest zero point of the histogram
𝐾	The embedded secret key
1/𝑔	Fraction of tuples selected for watermark embedding
𝛼	Number of attributes in the relational database available for embedding watermarking
𝐿	The length of watermark data 𝑊
𝜏	Detection parameter