2026-09-20T22:30:08Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/108288 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Bernhard, Jennifer Bernhard, Jennifer Franke, Steven Makela, Jonathan Schutt-Aine, Jose Gao, Grace Kataria, Cara Yang 2020-08-27T00:50:09Z 2020-08-27T00:50:09Z 2022-08-27T00:51:40Z 2020-04-29 2020-05 Conventional techniques currently used for secure communications are subject to significant vulnerabilities, especially for wireless systems. Unauthorized interceptors have more computation power than ever before to record and potentially decode sensitive information, and there is very little protection against disruptive interference, i.e., jamming. Our research goals are to identify and characterize new methods using antenna design and radiation properties to increase the security of wireless networks. Two major threats are addressed in this work---jammers and eavesdroppers. The problem space outlined for the first threat is the open broadcast of the Global Positioning System (GPS), and the solution is developed from the view of a receiver seeking a desired signal in the presence of potentially stronger interference. In the second case, we consider any system with a known transmission angle but possible eavesdroppers in other directions. The proposed solution is a novel modulation technique that we call secure antenna polarization modulation, or SAPM. For both cases, we share the theory, design justifications, and simulation results, as well as measurement data from prototypes. Based on the presented ideas, results, and analysis, there is high potential for these solutions in a variety of wireless applications, especially those that are limited in their ability to use traditional methods for security. Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-05-01 The student, Cara Kataria, accepted the attached license on 2020-04-29 at 09:01. The student, Cara Kataria, submitted this Dissertation for approval on 2020-04-29 at 09:01. This Dissertation was approved for publication on 2020-04-29 at 11:08. DSpace SAF Submission Ingestion Package generated from Vireo submission #15110 on 2020-08-25 at 17:42:01 Made available in DSpace on 2020-08-27T00:50:09Z (GMT). No. of bitstreams: 3 KATARIA-DISSERTATION-2020.pdf: 25368881 bytes, checksum: f61902445077aadda91f2d0d42c12073 (MD5) LICENSE.txt: 4209 bytes, checksum: 8862412bad6ba73669fa6e0b06c6f6a4 (MD5) PROQUEST_LICENSE.txt: 4555 bytes, checksum: 8040668444ecf8263e209b3a12803a61 (MD5) Previous issue date: 2020-04-29 Embargo set by: Seth Robbins for item 115902 Lift date: 2022-08-27T00:50:22Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 115902 Lift date: 2022-08-27T00:51:40Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Author requested closed access (OA after 2yrs) in Vireo ETD system Limited application/pdf http://hdl.handle.net/2142/108288 en Copyright 2020 Cara Yang Kataria secure antenna polarization modulation physical layer security direction finding global positioning system (GPS) Antenna-driven methods for increased wireless network security text Thesis Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Dissertation Ph.D.