PUF-Assisted Lightweight Group Authentication and Key Agreement Protocol in Smart Home

Table 2

Security feature comparison.

Feature	[20]	[8]	[9]	[46]	[47]	[48]	Our protocol
User anonymity
Untraceability
Mutual authentication
Perfect forward secrecy
Dynamically devices joining
Device revocation
The number of factors used	Three	Three	Two	N/A	Two	Three	Two
Password/biometrics update
Smartphone/smartcard lost attack				N/A
Smart device lost attack				N/A
User impersonation attack
Device impersonation attack				N/A
HG impersonation attack	N/A		N/A
Session key security
Replay attack
Privileged-insider attack
Ephemeral secret leakage attack	N/A	N/A	N/A

¹N/A means not considered. ² means the scheme supports the functionality/security feature. ³ means the scheme does not support the functionality/security feature.