Secure VoIP: call establishment and media protection
2005 (English)In: Proceedings of 2nd Workshop on Securing Voice over IP, 2005Conference paper (Refereed)
In this paper we study the possibility of establishing a secure VoIP telephone call using SIP. Different security services relevant for VoIP are presented and we argue that end-to-end authentication and encryption should be provided by default. For media protection we evaluate the possibility of using either SRTP or IPSec, and we examine several alternatives of how a secure VoIP call can be established. The solution we suggest is based on SRTP for media protection, S/MIME and MIKEY for end-to-end authentication and keying, and TLS for hop-by-hop protection of SIP messages. We also present measurements of secure call establishment for MIKEY, SRTP and IPSec using our own SIP user agent (minisip). Our conclusion is that the call establishment delay will not be significantly affected by introducing these security protocols.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-26065OAI: oai:DiVA.org:kth-26065DiVA: diva2:369651
2nd Workshop on Securing Voice over IP, June 2005, Washington DC, USA
QC 201011112010-11-112010-11-112010-11-11Bibliographically approved