Performance of secure SIP and LoST signaling in a Next Generation 9–1–1 testbed

Abstract

Security is an important concern in Voice over IP (VoIP) applications. An approach to securing the signaling, such as the Session Initiation Protocol (SIP) and Location to Service Translation (LoST) messages, is to use Transport Layer Security (TLS). Several studies have measured the impact of using TLS on SIP. However, there have not been any tests on the impact of TLS or Internet Protocol Security (IPSec) on IP-based emergency calls or Next Generation 9-1-1 (NG-9-1-1). In this paper, we address the practical issues in establishing a secure framework for NG-9-1-1 with performance metrics such as call setup and server processing delays.