VoIP has become a major application of multimedia communications over IP. Many initiatives around the world focus on the detection of attacks against VoIP services and infrastructures. Because of the lack of a common labeled data-set similarly to what is available in TCP/IP network-based intrusion detection, their results can not be compared. VoIP providers are not able to contribute their data...

SPam over Internet Telephony (SPIT) is a rising IP voice telephony threat. Voice over IP enables the transmission of telephone calls over the Internet, as opposed to plain old telephone service. Internet Telephony essentially means low-cost phone calls, i.e. a clear benefit for both consumers and businesses, which may also lead to cheap methods of mass advertising. Still, industry observers war...

With developments in voice over IP (VoIP), IP-based wireless data networks and their application services have received increased attention. While multimedia applications of mobile nodes are served by Session Initiation Protocol (SIP) as a signaling protocol, the mobility of mobile nodes may be supported via Mobile IP protocol. For a mobile node that uses both Mobile IP and SIP, there is a seve...

Third-party call control (3PCC) is essential to implementing advanced services in Voice-over-IP (VoIP) networks. It allows intermediary applications to control how the media streams of endpoint devices are connected together. However the Session Initiation Protocol (SIP), the widely adopted open standard for VoIP signaling, presents a number of challenges that make 3PCC in SIP complex and prone...

VoIP (Voice over IP) services are gaining more popularity recently. This work considers providing VoIP services in an Internet-enabled mobile ad hoc network (MANET). Since MANET does not have a fixed connection to the Internet, we propose to attach one or multiple cellular interfaces to the gateway of the MANET to establish the connection so that users can enjoy mobile VoIP services. Connecting...

SIPHoc is a middleware infrastructure for session set up and management in MANETs. SIPHoc is compliant to the SIP standard, does not require any centralized components, is message efficient (through routing message piggybacking), and independent of the routing protocol (currently, SIPHoc supports both AODV and OLSR). Moreover, SIPHoc allows seamless interaction with the Internet by treating nod...

The Session Initiation Protocol (SIP) is an application-layer protocol commonly used in VoIP for communication over the Internet. In this paper we describe a method to assess a particular kind of vulnerability of SIP implementation so that we could gain insights into its robustness. We used PROTOS as a tool to carry out exception element injection into SIP INVITE method and test it against a SI...

We present a session initiation protocol (SIP) network design for a voice-over-IP network to prevent congestion caused by people calling friends and family after a disaster. The design increases the capacity of SIP servers in a network by using all of the SIP servers equally. It takes advantage of the fact that equipment for voice data packets is different from equipment for signaling packets i...

In this paper we present results, which have obtained by extensive simulations for Mobile IP and Session Initiation Protocol from the perspective of VoIP service in wireless Internet access. After illustrating the problem in these two protocols for diverse cases of mobility management, we propose an integrated model, to reduce the handover latency and packet loss during handover. This combinati...