Table 2.

BAN logic notations

A| ≡ X	A believes a statement X
$U\stackrel{K}{\leftrightarrow }S$	Share a key K between user and sever
#X	X is fresh
A ⊲ X	A sees X
A|∼X	A said X
{X, Y}K	X and Y are encrypted with the key K.
(X, Y)K	X and Y are hashed with the key K.
< X > K	X is xored with the key K