Symbol | Description |
Ui, Sj IDi, SIDj PWi bi SC DIDi, DIDGWN Ki, Kj SK ai, ri, rg, rj h(.) f(.) F(.) TS EK(.), DK(.) ♁ ‖ | User i and sensor node j Identities of Ui and Sj Ui’s password Ui’s biometric Smartcard of Ui Dynamic identities of Ui and GWN Keys generated by Ui and Sj Session key established between entities Random numbers One way hash function Decoding function Fuzzy commitment Time stamp Symmetric encryption and decryption with K Exclusive OR operation Message concatenation operation |