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

Table 4

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]	0.32	0.15	0.62	184.29	740.01
Odelu and Das [8]	0.36	0.31	0.08	377.4	105.8
Cheng et al. [12]	0.68	0.24	0.37	275.4	416.5
Yamada et al. [14]	1.16	1.55	1.84	1595.2	1822.3
Zhou et al. [9]	0.19	0.12	0.94	153.9	1123.7
Fog-CPS scheme	0.06	0.24	0.04	253.2	43.28
Second experiment
Guo et al. [6]	0.034	0.02	0.05	24.49	63.09
Odelu and Das [8]	0.05	0.09	0.02	99.21	27.87
Cheng et al. [12]	0.09	0.04	0.03	36.85	34.88
Yamada et al. [14]	0.41	0.88	0.38	911.76	383.99
Zhou et al. [9]	0.08	0.02	0.11	20.18	119.57
Fog-CPS scheme	0.017	0.06	0.011	65.47	11.26