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As VoIP (Voice-over-IP) Services are becoming more popular, various types of attacks against them are increasing. The main protocol that is used in VoIP is SIP. SIP is subject to various types of attacks including Denial-of-Service (DoS) attack. This paper reports our experiment of simulating VoIP system using existing open source tools and technology. The simulated VoIP system is used to demonstrate...
Network security technologies have different issues that is important in next generation networks because of the real-time nature of its applications (e.g. VoIP and IPTV). The main requirements of these types of applications is to handle the attack situations without quality degradation. There are many references for implementation of intrusion detection systems in VoIP infrastructures but there is...
IP Telephony or simply Voice over IP (VoIP) is technology that enables real time voice communications over packet switched networks using TCP/IP. This technology is booming and its deployment is very complex. VoIP is often deployed in an open environment; therefore, it is subject to the same threats, e.g., denial-of-service attacks (DoS), frequently seen on the Internet. Given this, our first objective...
Voice over Internet Protocol (Voice over IP, VoIP) is one of a family of communication protocols, and transmission technologies. It is used for delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks. Session Initiation Protocol (SIP) is a signaling protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet...
In this paper, we present a lightweight defense mechanism against VoIP attacks, called VoIP Shield, that can detect counterfeit or MITM modified messages as well as replay attacks without ever changing the underlying VoIP protocol. We then empirically tested our design in conjunction with deployed Vonage VoIP services against a large body of attacks including billing, call redirection, voice pharming,...
In this paper we introduce some attack types, which can be led against VoIP traffic and we present protection forms against them. We have performed an experiment on the proposed protection model, which was focused on signaling DoS attack with aim to cause malfunction of the software exchange Asterisk. For attack we have used software tool SIPp as messages generator to flood the exchange with a huge...
A finite state machine contains a finite number of states and produces outputs on state transitions after receiving inputs. Finite state machines are widely used to model systems in diverse areas, including sequential circuits, certain types of programs, and, more recently, communication protocols. The denial of service (DoS) attacks are the hackneyed and evil cyberattacks in the IP which can be easily...
As the core infrastructure of the VoIP, IMS and IPTV, SIP based network is now increasingly been deployed throughout the world. Due mainly to the relatively high flow rate and the exorbitant session maintenance, SIP servers are similarly susceptible to the Denial-of-Service (DoS) Attacks above the IP stack, especially when the Distributed spoofing URI is considered. A hybrid SIP DoS detection method...
Research, Development and Evaluation Commission once hold an Internet election of “Top Ten Complaints”, the result showed that the overabundance of phone and Internet fraud was included. This result represents that the phone and Internet fraud trouble people a lot. Thus, this paper will first discuss the analysis of the crime mode of phone and Internet fraud and the collect the security threats of...
Through deeply analysis of INVITE flooding attack of SIP based VoIP system, a novel VoIP flooding detection scheme called CDVFD (Call Duration based VoIP Flooding Detection) is presented. The CDVFD method makes use of SIP signaling bidirectional interaction, and it can make fast detection using Chi-square value, and can distinguish from normal high VoIP traffic. Experimental results show the effectiveness...
Voice-over-IP (VoIP)-based services are becoming a popular alternative to traditional public switched telephony. The increasing number of users make VoIP also an interesting target for attackers. VoIP phishing and identity theft are gaining relevance. The lack of options for the reliable authentication between communication partners and the possibilities for anonymisation in IP-based telephony will...
In this study, we discussed with the protocol of SIP of VoIP. At first, using NS2 simulation software to analysis, then we researched those entities. Because of the impact of VoIP Quality of Service (QoS) as a major factor is the rate of packet loss. And of the human beings, the discontinuous voice caused by a small amount of packet loss can be tolerated. By using actual VoIP equipment, we observing...
This study is focus on SIP of VoIP, and simulated and analysed by NS2. In addition, because of the security issues are the main factor to affect its popularization, and the DDOS attack has become one of the more serious issues in VoIP network security domain. Therefore this research carries on the simulation analysis to various types attack by NS2, and further discusses under the DDoS attack between...
The SIP-based VoIP system is build on the IP network, so it is affected by the IP network security problem. SIP-based VoIP system has many security problems because of the security mechanism of VoIP system and other external factors. These effects relate to the following three aspects: confidentiality, integrity and availability. This paper analyzed the mechanism of VoIP system and the components...
Voice over Internet Protocol (VoIP) is the newest and the fastest growing technology which consists of routing voice conversations over IP-based network. The flexibility of the VoIP system and the convergence of voice and data networks brings with it additional security requirements, VoIP availability is the most important one. Denial-of-service (DoS) attacks are the main concerns with regard to causing...
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