Server-aided immediate and robust user revocation mechanism for SM9

Cybersecurity

Table 4 Performance evaluation of the server

#Users	OpenMP^∗	CTInit		CTUpdate		Transform
		Time	Throughput	Time	Throughput	Time	Throughput
100	N	0.18	40.63	0.34	21.11	0.19	38.46
	Y	0.03	275.99	0.05	153.42	0.03	257.31
500	N	0.90	40.90	1.76	20.89	0.96	38.37
	Y	0.11	342.12	0.21	170.68	0.12	313.51
1,000	N	1.81	40.43	3.57	20.53	1.90	38.70
	Y	0.21	351.81	0.44	167.30	0.27	273.58
2,000	N	3.60	40.76	7.14	20.56	3.76	39.06
	Y	0.42	348.42	1.05	140.09	0.48	305.55
3,000	N	5.53	39.82	10.57	20.83	5.79	38.03
	Y	0.80	273.93	1.50	147.24	0.85	258.03
4,000	N	7.31	40.16	14.02	20.92	7.65	38.33
	Y	1.12	262.84	2.19	133.82	1.08	270.54
5,000	N	9.10	40.32	17.78	20.63	9.68	37.90
	Y	2.02	181.82	2.38	154.01	1.31	280.72
6,000	N	11.05	39.81	21.33	20.64	11.64	37.82
	Y	1.69	261.18	2.90	151.68	1.65	266.10
7,000	N	12.89	39.82	24.80	20.70	13.55	37.90
	Y	1.97	260.82	3.50	146.89	1.81	283.20
8,000	N	14.77	39.73	28.57	20.54	15.57	37.68
	Y	2.78	210.70	4.06	144.58	2.19	268.05
9,000	N	16.71	39.51	32.16	20.53	17.57	37.57
	Y	3.06	215.96	4.40	150.07	2.33	283.38
10,000	N	18.43	39.81	35.57	20.62	19.57	37.49
	Y	2.98	246.49	4.85	151.20	2.68	273.60

^‡Metrics are collected on an Ubuntu 16.04 server with 8 Intel E5-2609 v4 @1.70 GHz cores. Note that time in the table above is given in seconds (s). Throughputs are measured by evaluating the average size of data (in megabytes) processed per second (MB/s)
^*In this column, Y means OpenMP is enabled where N means OpenMP is not enabled