LSKE: Lightweight Secure Key Exchange Scheme in Fog Federation

Table 3

Comparison of computation cost.

No.	Schemes	Hash function	Point multiplication (Pm)	Public key encryption	Public key decryption	Symmetric key encryption (Se)	Symmetric key decryption	Total cost	TC (ms)
1	Yashar et al.	7Th	0	3Pe	3Pd	0	0Sd	7Th + 3Pe + 3Pd	23.1161
2	Proposed	8Th	2	2Pe	2Pd	0	0Sd	8Th + 4Pm + 2Pe + 2Pd	19.8704