Distortion-Free Watermarking Approach for Relational Database Integrity Checking

Algorithm 3

Watermark computation.

Input: Database , Secret key , and number of groups  

Output: Watermark certificate

 (1) Begin

(2) Database partitioning into groups  // see Algorithm 1

(3) Group watermarks computation   // see Algorithm 2

(4)   //watermarks groups concatenation

(5)     // Encrypt watermark

(6)     // watermark certificate

(7) Return

(8) End