Voice over IP (VoIP) and Internet Multimedia Subsystem
technologies (IMS) are rapidly being adopted by consumers,
enterprises, governments and militaries. These technologies offer
higher flexibility and more features than traditional telephony
(PSTN) infrastructures, as well as the potential for lower cost
through equipment consolidation and, for the consumer market, new
business models. However, VoIP systems also represent a higher
complexity in terms of architecture, protocols and implementation,
with a corresponding increase in the potential for misuse.
In this book, the authors examine the current state of affairs
on VoIP security through a survey of 221 known/disclosed security
vulnerabilities in bug-tracking databases. We complement this with
a comprehensive survey of the state of the art in VoIP security
research that covers 245 papers. Juxtaposing our findings, we
identify current areas of risk and deficiencies in research focus.
This book should serve as a starting point for understanding the
threats and risks in a rapidly evolving set of technologies that
are seeing increasing deployment and use. An additional goal is to
gain a better understanding of the security landscape with respect
to VoIP toward directing future research in this and other similar
emerging technologies.
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