2026-09-21T17:15:45Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/29730 2023-07-10 col_2142_8888 col_2142_5131 com_2142_8887 com_2142_234 com_2142_5130

Hu, Yih-Chun Esteki, Danesh 2012-02-06T20:13:23Z 2012-02-06T20:13:23Z 2011-12 2012-02-06T20:13:23Z 2011-12 One of the primary advantages of spread spectrum communication is its resistance to interference and jamming. However, it has the drawback of requiring the pre-establishment of a secret code between sender and receiver. This requirement can lead to scaling and security issues, especially in a broadcast setting; as a result, several “uncoordinated” approaches have been proposed that do not require a pre-established secret code. In this thesis, we examine the underlying assumptions of these approaches and their resource requirements. In particular, we develop the model of a reactive jammer, parameterize it with varying levels of ability, and use this model to analyze three proposed keyless jamming mitigation techniques. We show that many of the uncoordinated spread spectrum schemes are infeasible for realistic computational powers and allocations of bandwidth even if the attacker simply uses commercial-off-the-shelf equipment. We also show that the third scheme, BBC codes, is vulnerable to a mark-cancellation-and-insertion attack. In particular, we show how an attacker can use multiple sinusoids to “search” for a cancellation signal over the space of phase and channel condition. We also propose modifications to improve the BBC codes, which can provide more robust jamming resistance with plausible system bandwidth requirements. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-11-04T14:50:09Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Esteki_Danesh.pdf: 284200 bytes, checksum: b254a78699139a5257eca933b8f2cf3f (MD5) Made available in DSpace on 2012-02-06T20:13:23Z (GMT). No. of bitstreams: 2 Esteki_Danesh.pdf: 284200 bytes, checksum: b254a78699139a5257eca933b8f2cf3f (MD5) license.txt: 4065 bytes, checksum: 4ed87e5f83520cab7e6a3f66423fc7c3 (MD5) http://hdl.handle.net/2142/29730 en Copyright 2011 Danesh Esteki Jamming Mitigation Requirements for keyless jamming mitigation Dissertation / Thesis text Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Thesis M.S. MS:Electr & Computer Eng-UIUC 10KS1200MS