Fig 1.
Our RFID system model.
Fig 2.
Hierarchical trust management framework.
Table 1.
Different interaction behaviors of a reader.
Fig 3.
Example of time window mechanism in D-S scheme.
Fig 4.
Algorithm of computing the local trust of reader.
Fig 5.
Algorithm of computing the global trust of reader.
Fig 6.
Ample of time window mechanism in VIP scheme.
Fig 7.
The realization process of VIP scheme.
Fig 8.
Computing the trust of authentication center.
Fig 9.
Network topology in the simulation experiments.
Table 2.
Default simulations parameters.
Fig 10.
The convergence speed of D-S scheme.
(a) Event result (Speed = 40m/s) (b) Trust result (Speed = 40m/s).
Fig 11.
Comparation of convergence speed.
Fig 12.
Comparation of malicious event detection rate.
Fig 13.
Effect of mobility of tag on detection rate of malicious event.
(a) Event result (Speed = 15m/s) (b) Trust result (Speed = 15m/s) (c) Event result (Speed = 70m/s) (d) Trust result (Speed = 70m/s).
Fig 14.
Effect of communication range of tag on detection rate of malicious event.