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Safety Dimensions of Session Initiation Protocol

Author(s): K.V.N.R. Sai Krishna

Journal: International Journal of Computer Science and Mobile Computing
ISSN 2320-088X

Volume: 2;
Issue: 8;
Start page: 63;
Date: 2013;
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With the appearance of multimedia applications and the upcoming age of Voice over IP (VoIP),Voice setup and resources control protocols such as SIP and H.323 over the Internet are becomingincreasingly attractive applications. In the last few years as a real competitor in traditional telephony services(PSTN), SIP has gained much attention when compared with H.323. SIP works at presentation andapplication layer thus it mainly faces security issue at these layers. The objective of this thesis is to describethe most relevant SIP related security issues and then present security mechanisms that can be deployed toovercome the SIP security related issues. This effort demonstrates the tasks necessary to enhance the SIPsecurity both inside and outside of the network. It is divided into three main parts, where the first partdescribes the SIP architecture, for example, the SIP rivals, SIP components and how a SIP system works.The second part is about some vulnerability issues of concern to SIP, study of the proposed securitymechanism and also analysis on how possible threats to the SIP system such as call hijacking, messagetempering and DoS attack, affect the SIP based VoIP system. The third and final part describes differentsteps that have been taken to avoid SIP attacks, by implementing some of the proposed security mechanisms.
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