Hacking VoIP

Summary

Securing VoIP networks is not an easy task, but it is an important one. While the process can be cumbersome, deploying SIPS, SRTP, or ZRTP can drastically reduce the attack surface on a VoIP network. The ability to provide encryption at both the session layer and media layer can ensure that users are receiving the same level of security as, if not more than, they would have if using traditional phone systems. Furthermore, sensitive audio communication, from internal calls regarding stock information to privacy concerns about personal data, might be mandated to be as secure as any other entity (e.g., files and folders) on the network holding the same type of information. Finally, soft phones using SRTP can deploy new technologies such as ...