Cryptanalysis and Enhancement of an Authenticated Key Agreement Protocol for Dew-Assisted IoT Systems

Table 3

Notations applied in e-SMDAS protocol.

Parameters	Description	Parameters	Description
	The security parameter		The ephemeral private keys of , , respectively
	The cloud/fog server		The timestamps
	The sensor node		One-way hash function defined from to
	The dew server		One-way hash function defined from to , where is the length of session key
S	The secret key of		One-way hash function defined from to
	The identity of , , respectively		The adversary