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

Table 13

Comparative key space analysis.

Algorithm	STC-IES	[37]	[65]	[71]	[89]	[90]	[91]	[92]	[93]
Key space	2^256	3.9402 × 10^185	2^168	2^192	2^128	2^128	10^128	2^280	2^128