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

Table 4

Symbols for BAN Logic.

Symbol	Meaning
	U Believe the Statement X
	The Statement X is Fresh
	U once Said X
	Formula X is encrypted by key K
	Formula X is combined by key K
	U Control over the Statement X
	U See the Statement X
	U and S shared key K for communication
SK	Session Key
T	Time Stamp