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

Table 2

Notations applied in SMDAS protocol.

Parameters	Description
	The cloud/fog server
	The sensor node
	The dew server
	The identity of , , respectively
S	The secret key of
	The password of sensor node
	Timestamp generated by , , respectively
h( )	One-way hash function defined from to
	The adversary