SUBBASE: An Authentication Scheme for Wireless Sensor Networks Based on User Biometrics

Table 2

Symbols and notations.

Abbreviation	Description
	Identity of user
h(.)	One way hash function
()	Encryption of message
()	Decryption of message
	Concatenation operator
Δt	Time interval for transmission delay
xo	Secret value known to TN
bio	Biometric of user
RI	Requested Information of user