A Lightweight Privacy Protection User Authentication and Key Agreement Scheme Tailored for the Internet of Things Environment: LightPriAuth

Table 1

Symbols used in the PriAuth.

Symbols	Meaning
	Gateway
,	The ith user and his identity
	The jth sensor node and its identity
||	Connects two strings together
	XOR operation
	’s secret key
	The generator of ECC
	Shared key between and
	Timestamp
	General hash function