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

Table 12

Security feature comparison.

Security feature	[1]	[3, Scheme 2]	[7]	[9]	PriAuth
User anonymity	×	×	√	√	√
Sensor anonymity	×	×	×	×	√
Shared key privacy	√	√	√	√	√
Traceability of user	×	×	√	√	√
Traceability of sensor	×	×	×	×	√
Loss of synchronization	√	√	×	√	√
Malicious sensor attack	√	√	√	√	√
User impersonation attack	×	√	√	√	√
Sensor impersonation attack	√	√	√	√	√
Replay attack	√	√	×	√	√
Inside user attack	√	√	√	√	√