With the population of an internet telephony, the security issues of a SIP application service is focused on, currently. For example, VoIP is easier to access than existing PSTN, and more exposed at many security threats. However, there is not enough monitoring and attack detecting devices, yet. In this paper, we propose analysis factors, a detection example to use it and required collecting in...

Supporting telephone services using wireless LAN as the access network is an emerging service. The SIP and IEEE 802.11e are perhaps the two most promising protocols to support such services. In this paper, we show how to integrate SIP and 802.11e to conduct call admission control and resource reservation to support VoIP’s QoS in IEEE 802.11e WLANs. Besides, we also suggest some adjustments and ...

This paper describes the development of a user friendly Voice over Internet Protocol (VoIP) monitoring tool. This monitoring tool was developed by using Java Programming and tested on a VoIP network testbed where it uses Session Initiation Protocol (SIP) and Real-time Transport Protocol (RTP) to transmit the voice signal with G.711 modern codec. Quality of Service (QoS) parameters that are bein...

This paper focuses on authentication issues and user ID detection depending on the voice signature of the incoming Voice over IP (VoIP) calls. Firstly, a complete speaker recognition system based on LPC feature extraction and decision based on Artificial Neural Network was described and built using MATLAB package. Then, MATLAB package was used to develop a simplified prototype version of the mo...

Many applications are transferred from C/S (Client/Server) mode to P2P (Peer-to-Peer) mode such as VoIP (Voice over IP). This paper presents a new security architecture, i.e. a trustworthy authentication algorithm of peers, for Session Initialize Protocol (SIP) based P2P computer networks. A mechanism for node authentication using a cryptographic primitive called one-way accumulator is proposed...

The growing popularity of IP telephony systems has made them attractive targets for spammers. Voice call spam, also known as Spam over Internet Telephony (SPIT), is potentially a more serious problem than email spam because of the real time processing requirements of voice packets. We explore a novel mechanism that uses duration of calls between users to combat SPIT. CallRank, the scheme propos...

This paper presents a framework that can be utilized for the protection of session initiation protocol (SIP)-based infrastructures from malformed message attacks. Its main characteristic is that it is lightweight and that it can be easily adapted to heterogeneous SIP implementations. The paper analyzes several real-life attacks on VoIP services and proposes a novel detection and protection mech...

Voice service is vulnerable to a number of attacks that can compromise the confidentiality, integrity and authenticity of voice communication. As a result, this paper proposes a security protocol that protects these security aspects of voice service. The proposed security protocol identifies the security roles of the different components within VoIP domain applying SIP as the signalling protoco...