Comparative study on DOS attacks Detection Techniques in SIP-based VOIP networks

Thanks to the low cost of communication provided by Voice over Internet Protocol (VoIP) networks, the use of VoIP services has significantly increased. Session Initiation Protocol (SIP) is the main protocol used for nowadays VoIP services. Being a text based protocol and implemented in an open environment, SIP is exposed to various security threats including flooding. One of the most well-known attacks is Denial of Service. Given this, numerous flooding detecting techniques were designed. Our paper will focus on presenting a study of those different techniques, and comparing two specific proposed mechanisms for detecting anomalies and alerting users of possible intrusions. Besides, we propose a new VoIP scheme of detecting attacks, so as to protect private communications and raise security awareness in SIP-based VoIP networks.