Robust and Efficient Authentication Scheme for Session Initiation Protocol

Table 1

Registration and authentication phase of Arshad and Nikooghadam’s scheme.

Registration	(1) Generate		(3) Compute
	Compute
	= .		= .
			.
Authentication	(1) Generate		(3) Generate
	= .		= ,
			= ,
			= .
	(5) = ,
			(7) = ,
	,
	= ,		,
	= ,		= .
	= .