Secure Patient Authentication Framework in the Healthcare System Using Wireless Medical Sensor Networks

Table 2

Notations and its descriptions.

Symbol	Description
Uia	Medical professional
SNja	Sensor node
IDia	User’s identity
K	Gateway secret key
R1, R2, R3	Random numbers
||	Concatenation function
GW	Gateway node
PWia	User’s password
IDSNj	Sensor nodes identity
TIDia	Temporary-identity generated by GW for Uia
h(·)	Collision-free hash-operation
⊕	Bitwise XOR operation