Open Access
Table 1
Notations used in Hu et al 's scheme
Notation | Definition |
---|---|
Ui, GWN, Sj | The i-th user, gateway and the j-th sensor node |
IDi | Identity of the i-th user |
PIDi | Pseudonymous identity of the i-th user |
IDGWN | Identity of gateway |
SIDj | Identity of the j-th sensor node |
PWi | Password of the i-th user |
SC | Smart card |
KGU, KGS | Private keys only known to GWN |
TCi | The temporal credential of the i-th user |
TCj | The temporal credential of the j-th sensor node |
TEi | Expiration time of a Ui’s temporal credential |
P | Basic point of the elliptic curve |
N1, N2, N3, x, x1, x2, x3 | Random numbers |
SK, SKij (= SKji) | The session key between Ui and Sj |
⊕ | Bitwise XOR operation |
|| | Concatenation operation |
h(·) | A secure Hash function |
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