Table 5.
Performance comparisons of our advanced scheme and related schemes.
| Participant/Computations | Das [17] (2009) | Yeh et al.[21] (2011) | Xue et al.[24] (2013) | Our Advanced Scheme |
|---|---|---|---|---|
| User (Ui) | 4 TH | 1 TH + 2 TECC | 7 TH | 9 TH |
| Sensor (Sj) | 1 TH | 3 TH + 2 TECC | 5 TH | 6 TH |
| Gateway node (GWN) | 7 TH | 4 TH + 4 TECC | 10 TH | 11 TH |
| Computation costs | 12 TH | 8 TH + 8 TECC | 22 TH | 26 TH |
| Computation time | 0.0024 s | 4.8016 s | 0.0044 s | 0.0052 s |
TH: Time for SHA-256 one-way hashing computation; TECC: Time for ECC-160 encryption/decryption computation; s: Second.