This paper describes an approach for combining Session Initiation Protocol (SIP) based voice communication with Extensible Messaging and Presence Protocol (XMPP) based presence enhancements. The actual role of SIP and XMPP in the Internet Protocol (IP) based communication was analyzed, especially from the telecommunication carrier (Telco) point of view. The proposed infrastructure extends a typ...

The authenticated key agreement protocol is an important security protocol for the session initiation protocol, which allows the and the server to authenticate each other and generate a shared session key for privacy, integrity, and non-repudiation in their communications. Recently, Zhang et al. proposed a new authenticated key agreement protocol for the session initiation protocol using smart ...

Today Voice over Internet Protocol (VoIP) is used in large scale to deliver voice and multimedia over the packet data networks, such as the Internet. The Session Initiation Protocol (SIP) is widely used as a signalling protocol for VoIP. As SIP is being used more, the security of it is an important issue. In this paper, we concentrate on user authentication in SIP. We examine current solutions ...

The Session Initiation Protocol (SIP) protocol is commonly used to establish Voice over IP (VoIP) calls. IETF SIP standards do not specify a secure authentication process thus allowing malicious parties to impersonate other parties or to charge calls to other parties. This paper proposes an extension to the SIP protocol that uses an identity-based authentication mechanism and key agreement prot...

This document describes how to construct and interpret certain information in a PKIX-compliant (Public Key Infrastructure using X.509) certificate for use in a Session Initiation Protocol (SIP) over Transport Layer Security (TLS) connection. More specifically, this document describes how to encode and extract the identity of a SIP domain in a certificate and how to use that identity for SIP dom...

Support for real-time multimedia session services, such as real-time interactive voice-and-video-over-IP applications, is highly desirable in a mobile Ad Hoc Network (MANET). This paper presents a service discovery mechanism as an extension of the proactive OLSR (Optimized Link State Routing) protocol, enabling real-time interactive multimedia session applications using the Internet Engineering...

Many two-factor challenge-response based session initiation protocol (SIP) has been proposed, but most of them are vulnerable to smart card stolen attacks and password guessing attacks. In this paper, we propose a novel three-factor SIP authentication scheme using biometrics, password and smart card, and utilize the pi calculus-based formal verification tool ProVerif to prove that the proposed ...

End-to-end quality-of-service (QoS) support in middleware is critical to achieve publish/subscribe (pub/sub)-based distributed real-time and embedded (DRE) systems. This poster describes ongoing work on supporting QoS properties over wide area networks within the OMG’s Data Distribution Service (DDS) by leveraging the Session Initiation Protocol (SIP) and Session Description Protocol (SDP).

Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Abstract This document defines new functi...

This specification defines a load-control event package for the Session Initiation Protocol (SIP). It allows SIP entities to distribute load-filtering policies to other SIP entities in the network. The load-filtering policies contain rules to throttle calls from a specific user or based on their source or destination domain, telephone number prefix. The mechanism helps to prevent signaling over...