Secure Smart Healthcare Monitoring in Industrial Internet of Things (IIoT) Ecosystem with Cosine Function Hybrid Chaotic Map Encryption

Table 4

Encryption speed and its comparison with relative approaches.

Method	Encryption time (E.T) 256 × 256 keyframes (images)	Encryption time (E.T) 512 × 512 keyframes (images)	Encryption time (E.T) 1024 × 1024 keyframes (images)
Proposed	0.0670–0.08470	0.2205–0.2541	1.0079–1.1095
[20]	0.1616	0.6708	2.821
[37]	1.28	NA	NA
[40]	0.0949	0.4010	1.9857
[58]	0.080–0.082	0.327–0.333	NA
[59]	0.6212	NA	NA
[60]	0.3340	1.3357	5.3223
[61]	0.224	0.9731	3.8377
[62]	1.7874 (En & Dec)	NA	NA