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

Table 9

Security feature comparison.

Security feature	Wu et al. [9]	Wu et al. [14]	Chang and Le [11]	Chen et al. [1]	LightPriAuth
User anonymity	✓	✓	✓	✓	✓
User being tracked	✓	X	X	✓	✓
Sensor anonymity	✓	X	X	✓	✓
User anonymity to sensor	X	✓	✓	✓	✓
Loss of synchronization	✓	X	✓	✓	✓
With timestamp	X	X	✓	✓	✓
Offline dictionary attack	X	X	X	X	✓
Computation cost (ms)	29.9432	29.424	29.42	44.1234	29.4184
Communication cost (bytes)	564	624	412	492	396