Voice over IP, vulnerabilities and attacks

In recent years, Voice over IP (VoIP) services have been widely deployed on the Internet, and now account for a significant proportion of all communications, both for businesses and private individuals. This technology is essentially based on the SIP [TE 7 533] protocol for managing sessions between the various parties involved in an exchange of data, voice or video.

Several research studies, contributions to the IETF (Internet Engineering Task Force), and security bulletins issued in recent years have shown that the SIP protocol, and most implementations of it,...