A General Architecture for Multiserver Authentication Key Agreement with Provable Security

Table 1

Summary of notations.

Notation	Description
	user i
	server j
	the registration center
	the identity of the user i
	the password of the user i
	the identity of the server j
r	random number selected by the user i
s	the secret key of RC
n	the number of elements on
P	the point on the elliptic curve
	a secret value of the user i
	a secret value of the server j
	one-way hash function
	bitwise XOR operation
	concatenation operation