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How to Cheat at VoIP Security by Michael Gough, CISSP Thomas Porter CCNP, CCDA, CCS

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Chapter 9

IETF Encryption Solutions for VoIP

Solutions in this chapter:

Introduction

There are two competing breeds of VoIP signaling protocols, H.323 from the ITU and SIP from the IETF. Accordingly, there are also two groups of VoIP security protocols accompanying each of them. One for H.323 is a group of protocols named H.235.x, and the other for SIP includes TLS, S/MIME, and SRTP. They are not completely exclusive to each other. Some components are overlapped, such as X.509 digital certificate, TLS secured transport, and SRTP encryption. In this chapter, we will put our main focus on protocol suites for SIP ...

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