Securing Confidentiality and Integrity of SIP Based VoIP System in Reduced Call Setup Time

Negussie, Solomon (2014) Securing Confidentiality and Integrity of SIP Based VoIP System in Reduced Call Setup Time. Masters thesis, Addis Ababa University.

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Voice over IP is one of the quickest developing Internet services promised to have growing demand. However this demand is challenged by security pitfalls of the current internet security problems plus none flawlessness of the VoIP protocols themselves. Specially as any telecommunication service requires privacy, confidentiality, integrity and availability protection VoIP needs to assure its customers those information security principle concerns with tolerable quality of service, the concerns not raised frequently in PSTN(Public Switched Telephone Network) and other traditional telephone networks. Even though there are many protocols and security principles made available to be used by developers and service providers, however current applications are more on the quality and the extent of service they provide rather than the concern in security breach. However there are some VoIP application developers and service providers that provides the capability of encrypting the communication, which is not sufficient since the signaling is not protected due to fear of additional overhead. By this work we proposed new way of setting secure VoIP (Voice over Internet Protocol) session(secure in a context of confidentiality and integrity protection only) in SIP (Session Initiation Protocol) based VoIP system using the current recommended and best practices of securing VoIP so that the newly proposed system will have improved call setup time. We also designed and implemented the proposed secure call setup mechanism as a proof for the practicability of our recommendation and as a test bed to assess the effect of the proposed mechanism in modifying the time required to setup a secure call, i.e. confidentiality and integrity guaranteed session. We have compared our proposed mechanism of establishing a secure conversation and signaling session with a common secure session establishment technique and we have seen that our proposed system requires only 8.0 second to establish secure session, while the other common practices takes about 10.5 second. Hence the proposed system reduces the call setup time by about 2.5 seconds.

Item Type: Thesis (Masters)
Uncontrolled Keywords: VoIP, SIP, TLS, SRTP, ZRTP, MZRTP, Call Setup Time, Confidentiality, Integrity.
Subjects: H Social Sciences > HE Transportation and Communications
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Africana
Depositing User: Andriamparany Edilbert RANOARIVONY
Date Deposited: 28 Nov 2018 08:35
Last Modified: 28 Nov 2018 08:35

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