Distortion-Free Watermarking Approach for Relational Database Integrity Checking

Algorithm 2

Group watermark generation.

Input: Group

Output: Group Watermark

 (1)  Begin

(2)  for    to    do

(3) Sort all tuples in according to the increasing order of their primary key hash

(4) compute the determinant of   // th determinant group

(5) compute the minor of of   // minor of th group diagonal

(6) compute    // th watermark group

(7)  end for

(8) return

(9) end.