Reversible Fragile Watermarking Scheme for Relational Database Based on Prediction-Error Expansion

Table 2

Embedding impact in mean and variance of watermarked attributes.

Attribute	Before embedding		After embedding
	Mean	Variance	Error in mean	Error in variance
1	2959	78391	0	+1
2	156	12525	0	0
3	14	56	0	0
4	269	45177	+1	0
5	46	3398	0	0
6	2350	2431272	0	−12
7	212	717	0	0
8	223	391	0	0
9	143	1465	0	0
10	1980	78391	0	+1