Somewhat Homomorphic Encryption: Ring Learning with Error Algorithm for Faster Encryption of IoT Sensor Signal-Based Edge Devices

Table 2

Encryption operation time and size for various message spaces.

Message space (mod(t))	n (ciphertext degree)	Encryption operation time				Encrypted size
		Pub. key ms	Pv. key ms	Add. ms	Mult. ms	Pub. key KB	Ciphertext KB
2	512 (1)	25	57	<1	<1	12	24
	4096 (4)	210	520	2	150	386	781
	8192 (10)	425	1410	7	860	2256	4526
128	1024 (1)	55	112	<1	<1	29	60
	4096 (4)	225	610	4	160	490	975
	8192 (10)	448	1654	7	1140	5534	11052
1024	1024 (1)	52	108	<1	<1	35	69
	4096 (4)	225	620	4	214	535	1091
	8192 (10)	455	1825	9	554	6010	12105