A Novel RLWE-Based Anonymous Mutual Authentication Protocol for Space Information Network

Algorithm 2

Password update phase.

(1)	Input
(2)	;
(3)	;
(4)	ifthen
(5)	Deny the password update;
(6)	else
(7)	Input
(8)	;
(9)	;
(10)	;
(11)	Smart device stores ;