An Efficient Secret Key Homomorphic Encryption Used in Image Processing Service

Table 1

The correctness with different value of .

	Error rate (%)				Max. error			Average error
	None	CT	Add.	Scal.	CT	Add.	Scal.	CT	Add.	Scal.
1	0	28.1	99.3	54.4	17	13	26	2.34	5.46	5.45
2	0	15.5	0	37.6	3	0	3	0.26	0	0.54
3	0	0	0	8.4	0	0	1	0	0	0.08
4	0	0	0	0	0	0	0	0	0	0