1. Alexander AL, Wijesinha AL, Karne R (2009) An evaluation of secure real-time transport protocol (SRTP) performance for VoIP. In: Third international conference on network and system security, IEEE NSS 2009, Gold Coast
2. Arkko J, Camarillo G, Niemi A, Haukka T (1999) Security mechanism agreement for the session initiation protocol (sip). RFC 3329, Internet Engineering Task Force.
http://www.ietf.org/rfc/rfc3329.txt
3. CISCO Internal tool (2004) Cisco camelot phone call simulation tool. CISCO proprietary tool.
http://http://wwwin-vts.cisco.com/camelot/index.html
4. CISCO Internal tool (2006) Cisco internal automation gui environment. CISCO proprietary tool.
http://http://clutch.cisco.com:9601/swims/
5. Dierks T, Allen C (1999) The tls protocol version 1.0. RFC 2246, Internet Engineering Task Force.
http://www.ietf.org/rfc/rfc2246.txt