Chebyshev Polynomial-Based Authentication Scheme in Multiserver Environment

Table 5

Notations used in our scheme.

Notations	Description
UX, Sj, RC	X^th user/j^th server, registration centre
BX	Biometrics of UX
qRC	Master key of RC
ASIDj	Sj’s master key
	UX’s authentication key with Sj
SK	Session key between UX and Sj
H0 (.)	Cryptographic one-way hash function
Gen/Rep	Generation/reproduction algorithm
⊕, ||, Tn	XOR, concatenation, Chebyshev operation