LSKE: Lightweight Secure Key Exchange Scheme in Fog Federation

Table 2

Notations used for the proposed work.

No.	Notations	Description
1	IDA	Identity of Alice (fog center)
2	IDB	Identity of Bob (fog node)
3	NCa	Nonce of Alice (fog center)
4	NCB	Nonce of Bob (fog node)
5	Cha	Challenging of Alice (fog center)
6	CHb	Challenging of Bob (fog node)
7	Kas	The public key of Alice (fog center)
8	Kbs	The public key of Bob (fog node)
9	TA	Timestamp of Alice (fog center)
10	TB	Timestamp of Bob (fog node)
11	∆T	Expiration time
12	h	Hash
13	||	Concatenation