Conference Proceedings

Abstract

Voice over IP is one of the quickest developing Internet services and slowly replaces traditional telephony. However, while moving telephony to the public IP platform broadens its service capabilities, some security problems may occur. It is because the amount of threats existing in IP networks is much bigger than in case of traditional telephone networks. Therefore security challenges of VoIP public network are considered in this work in detail. Full security analysis is performed that covers many issues like protocol vulnerabilities, risks due to the voip infrastructure, sip vulnerabilities and voip services are also mentioned. Considerations regarding how those requirements may be compromised are also carried out, including threat analysis, overview of vulnerabilities and attack techniques against technologies underlying VoIP and specific for VoIP. Finally, some study of existing security mechanisms that could counteract vulnerabilities and prevent attacks is performed. Risk analysis is also carried out in this work. The most serious problems of VoIP public networks are this way identified and security solutions are proposed.