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Voice Over Internet Protocol (VoIP) and Security

Submitted By
Sanjay Yadav

Amity School Of Engineering And Technology
Amity University Rajasthan

Table of Contents

Abstract.........................................................................................................................3

Background ..................................................................................................................3

Quality of Service .........................................................................................................4

Latency ...........................................................................................................................4 Jitter.................................................................................................................................5 Packet Loss .....................................................................................................................5

VoIP Components..........................................................................................................5

End-user equipment.........................................................................................................5 Network components ......................................................................................................6 Call processor .................................................................................................................7 Gateways.........................................................................................................................7 Protocols..........................................................................................................................7 H.323...............................................................................................................................7 H.323 Security Concerns ................................................................................................9 SIP ..................................................................................................................................9 SIP Security Concerns.....................................................................................................10

NAT and VoIP..............................................................................................................11

Denial of Service...........................................................................................................11

Other Concerns ...........................................................................................................12

Conclusion....................................................................................................................13

References.....................................................................................................................14

ABSTRACT

Ever tried placing a voice call over the Internet. If you have, we are sure you haven’t had a pleasant experience. You might have even promised yourself never to try it again. Stop right there!!

Take some time-off from your busy schedules and have a look at what I have to say. I guarantee that you will change your mind. In the near future, if you make a telephone call, it is more than likely that it would be over the Internet or some other packet network. But, what is it that would make this possible? It is a bunch of protocols and standards; and years of research done by organizations all over the world that would bring about this revolution.

They call it ‘VOICE OVER IP’, ‘INTERNET TELEPHONY’ & a host of other names. I like to refer to it as ‘A Dawn Of a New Era in Telecommunications’.

This paper will describe Voice Over Internet Protocol (VoIP) to a level that allows discussion of security issues and concerns. Business concerns of implementing VoIP, components of a VoIP system, and relevant security issues and concerns as...
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