A Lightweight Attribute-Based Security Scheme for Fog-Enabled Cyber Physical Systems

Table 5

Processing times (sec)

Schemes	Setup+KeyGen (final KeyGen)	Encrypt (1 kB)	Decrypt (1 kB)	Encrypt (1 MB)	Decrypt (1 MB)
First experiment
Guo et al. [6]	0.37	0.16	0.68	186.78	740.01
Odelu and Das [8]	0.52	0.32	0.09	375.0	105.61
Cheng et al. [12]	1.0	0.31	0.42	361.21	515.24
Yamada et al. [14]	1.69	1.55	1.84	1533.4	1838.8
Zhou et al. [9]	0.31	0.15	1.10	154.2	1128.2
Fog-CPS scheme	0.10	0.24	0.04	253.7	43.28
Second experiment
Guo et al. [6]	0.045	0.02	0.05	24.49	63.09
Odelu and Das [8]	0.07	0.08	0.02	97.64	27.97
Cheng et al. [12]	0.11	0.04	0.03	39.84	36.10
Yamada et al. [14]	0.62	1.38	0.59	1330.16	580.92
Zhou et al. [9]	0.10	0.02	0.11	20.18	119.57
Fog-CPS scheme	0.027	0.06	0.01	65.76	12.92