VoIP Security
Dan Wing, Cisco Systems
Harsh Kupwade Patil, Southern Methodist University
The Internet has become an important medium for communication, and all kinds of media communications are carried on today’s Internet. Telephony over the Internet has received a lot of attention in the last few years because it offers users advantages such as long distance toll bypass, interactive ecommerce, global online customer support, and much more.
1. Introduction
H.323 and Session Initiation Protocol (SIP) are the two standardized protocols for the realization of VoIP.1,2 The multimedia conference protocol H.323 of the International Telecommunication Union (ITU) consists of multiple separate protocols such as the H.245 for control signaling ...
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