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Building information-theoretic confidentiality and traffic privacy into wireless networks
Descriptive
TypeOfResource
Text
TitleInfo
(ID = T-1)
Title
Building information-theoretic confidentiality and traffic privacy into wireless networks
Identifier
ETD_2824
Identifier
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http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056577
Language
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eng
Genre
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theses
Subject
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Topic
Electrical and Computer Engineering
Subject
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(authority = ETD-LCSH)
Topic
Wireless communication systems--Security measures
Abstract
(type = abstract)
This dissertation studies how information-theoretically secure mechanisms for confidentiality and data-traffic privacy can be incorporated into existing and emerging wireless systems. The dissertation consists of three parts. In the first two parts, we study how certain properties of wireless channels can be employed to enhance confidentiality services that have traditionally been the responsibility of higher layers. We first explore the use of the wireless medium for the extraction of secret keys at the two ends of a wireless link, wherein the transceivers at either end are separated by a rich multipath scattering environment. We build a low complexity algorithm that allows two wireless devices to extract a common sequence of random secret bits, by repeatedly probing and estimating a time-varying channel between themselves. Further, we report on an implementation and evaluation of our algorithm on a modified 802.11a system. Next, we study the problem of securely pairing wireless devices in proximity of one another by establishing a shared secret key using a public source of RF transmissions. We employ measurement data to characterize the rate at which bits can be extracted and explore the simultaneous use of multiple transmitters to increase rate. Finally, we study the case when the public transmitter itself is under the arbitrary control of an adversary and we demonstrate a method that can allow successful key-extraction even with such an active adversary. In the final part of this dissertation, we introduce the problem of an unintended information-leakage channel in data traffic consisting of varying packet sizes. Packet sizes convey semantic information that can be related to their con- tent, which can be used as a fingerprint for classification. We formally study the packet-size side channel and explore obfuscation approaches to prevent infor- mation leakage, while considering padded dummy traffic and delay as bounded resources. We show that randomized algorithms for obfuscation can be studied as well known information-theoretic constructs, such as discrete channels with and without memory, and often lead to efficiently solvable constrained optimization problems.
PhysicalDescription
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electronic resource
Extent
xvi, 147 p. : ill.
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Note
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Ph.D.
Note
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Includes bibliographical references
Note
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Includes vita
Note
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by Suhas Mathur
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Mathur
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Suhas
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1980-
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author
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Suhas Mathur
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Trappe
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Wade
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chair
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Advisory Committee
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Wade Trappe
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Mandayam
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Narayan
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co-chair
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Advisory Committee
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Narayan Mandayam
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Raychaudhuri
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Dipankar
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internal member
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Advisory Committee
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Dipankar Raychaudhuri
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Gruteser
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Marco
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Marco Gruteser
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Reznik
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Alex
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outside member
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Advisory Committee
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Alex Reznik
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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school
OriginInfo
DateCreated
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2010
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2010-10
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xx
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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Title
Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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NjNbRU
Identifier
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doi:10.7282/T3M61K05
Genre
(authority = ExL-Esploro)
ETD doctoral
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Rights
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The author owns the copyright to this work.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsHolder
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Name
FamilyName
Mathur
GivenName
Suhas
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DateTime
2010-08-25 22:37:35
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Name
Suhas Mathur
Affiliation
Rutgers University. Graduate School - New Brunswick
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Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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Technical
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ETD
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3747840
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