This document specifies a framework to enable configuration of Session Initiation Protocol (SIP) user agents (UAs) in SIP deployments. The framework provides a means to deliver profile data that user agents need to be functional, automatically and with minimal or no User and Administrative intervention. The framework describes how SIP user agents can discover sources, request profiles, and rece...

This paper introduces the current state-of-the-art of SIP (Session Initiation Protocol) and the use of SIP in supporting P2P (peer-to-peer) applications on mobile phones. The use of SIP in All-IP mobile phones is a step toward achieving supernetworking, providing the user with powerful yet conceptually simple tools for sending and receiving multimedia content over a wireless network. The analys...

Session Initiation Protocol (SIP) is a control protocol standardized by IETF and implemented on the application layer. It can be used to establish, modify, and terminate Internet conferencing, telephony and some other multimedia sessions.[1] SIP uses server and client architecture, Peer-toPeer (P2P) is another popular technology that accomplishes the same functionality in an overlay network whe...

SIP is a call control and signalling protocol that was adopted by the 3GPP to deliver IP multimedia services to the mobile network. Cross platform IP-telephony service creation is a challenging task. Although, the emergence of JAIN-SIP has reinforced the development and implementation of platform-independent IP-telephony services, the development of advanced cross-platform SIP (Session Initiati...

The existing security mechanisms in the Session Initiation Protocol are inadequate for cryptographically assuring the identity of the end users that originate SIP requests, especially in an interdomain context. This document defines a mechanism for securely identifying Peterson & Jennings Expires September 2, 2005 [Page 1] Internet-Draft SIP Identity March 2005 originators of SIP messages. It d...

In recent years, Session Initiation Protocol (SIP) is more and more popular. However, there are many security problems in the Session Initiation Protocol. In 2005, Yang et al. [9] proposed a secure authentication scheme for Session Initiation Protocol. This authentication scheme is based on Diffie-Hellman [2] concept, so the computation cost of this authentication scheme is very high. In order ...

Today, the session initiation protocol (SIP) is the predominant protocol for Voice-over-IP (VoIP) signalling. The intention of this paper is to present an overview of VoIP security issues both current and future – focusing on SIP. We start by presenting some fundamental differences between VoIP and the public switched telephone network (PSTN). We then look at specific problems for SIP signallin...

Session Initiation Protocol is a core protocol for coming real time communication networks, including VoIP, IMS and IPTV networks. Based on the open IP stack, it is similarly susceptible to Denial-of-Service Attacks launched against SIP servers. More than 20 different research works have been published to address SIP-related DoS problems. In this survey we explain three different types of DoS a...

The Session Initiation Protocol (SIP) will be used on a large scale as a session signalling protocol to provide legacy as well as new services. The 3rd Generation Partnership Project (3GPP) has decided to use the SIP protocol in the IP Multimedia Subsystem of future Universal Mobile Telecommunications System (UMTS) networks. If the SIP protocol is used in carrier grade networks, Quality of Serv...