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

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.