2026-09-19T12:42:36Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/333772022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Robert K. Cunningham.
Zue, Cory L
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2006-07-13T15:19:24Z
2006-07-13T15:19:24Z
2005
2005
http://hdl.handle.net/1721.1/33377
62558267
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.
Includes bibliographical references (p. 102-106).
Voice over Internet Protocol (VoIP) systems enable efficient communications over data networks, but security of VoIP and the impact of that security on communications quality has not been quantitatively modeled. A conversational model is adapted for VoIP and a computational model of communication quality - the Z-Model - is developed. VolIP conversations are simulated for networks with a range of performance characteristics including differing bandwidth, latency and bit error rates to evaluate the impact of security on communication quality. Results show that improving conficlentiality via encryption of conversation data packets does not introduce significant delays, but does increase bandwidth. In certain restricted-bandwidth environments this results in dramatic reductions of perceived conversation quality.
by Cory L. Zue.
M.Eng.
106 p.
9454143 bytes
9458539 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Modeling and assessing secure Voice over IP performance
Performance of Voice-Over Internet Protocol in airborne networks
Thesis
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<Abstract>Voice over Internet Protocol (VoIP) systems enable efficient communications over data networks, but security of VoIP and the impact of that security on communications quality has not been quantitatively modeled. A conversational model is adapted for VoIP and a computational model of communication quality - the Z-Model - is developed. VolIP conversations are simulated for networks with a range of performance characteristics including differing bandwidth, latency and bit error rates to evaluate the impact of security on communication quality. Results show that improving conficlentiality via encryption of conversation data packets does not introduce significant delays, but does increase bandwidth. In certain restricted-bandwidth environments this results in dramatic reductions of perceived conversation quality.</Abstract>
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