Table 3.

The comparison result of homomorphic matrix encryption schemes.

Matrix size	Method	Enc(s)	HE.MatAdd(s)	HE.MatMult(s)	Dec. (s)
32 × 32	seIMC	6.998	7.345	10.639	0.0768
	Jiang's	0.09	0.01	15.592	0.0543
	Ours	0.679	0.204	0.946	0.067
64 × 64	seIMC	7.82	8.21	12.287	0.312
	Jiang's	0.196	0.01	37.793	0.705
	Ours	0.8	0.233	1.24	0.222
128 × 128	seIMC	9.843	10.402	15.824	1.305
	Jiang's	–	–	–	–
	Ours	1.127	0.291	1.525	0.862

Bold values indicate our methods have a lower running time than the comparison methods.