Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/35711
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Vilela, João Paulo da Silva Machado Garcia | - |
dc.contributor.author | Sousa, João André Gomes de Sá e | - |
dc.date.accessioned | 2017-01-13T16:07:06Z | - |
dc.date.available | 2017-01-13T16:07:06Z | - |
dc.date.issued | 2015-09-09 | por |
dc.identifier.uri | https://hdl.handle.net/10316/35711 | - |
dc.description | Dissertação de Mestrado em Engenharia Informática apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra | por |
dc.description.abstract | As Wireless Networks become increasingly popular, security is turning out to be something of the utmost importance to guarantee the confidentiality and robustness of communication under these systems. This thesis focuses on using physical-layer mechanisms to enhance confidentiality against eavesdroppers, more specifically, a recently published tweaked version of Frequency-Hopping - Uncoordinated Frequency Hopping - with the incorporation of defensive jammers for added security. For that, we characterize the secrecy level of this spread spectrum scheme, by devising a mathematical framework to assess the secure throughput (probability of secure communication) of devices operating under Uncoordinated Frequency Hopping. We then extend this mathematical model to accommodate the impact of defensive jammers and propagation effects on the legitimate communication, as well as, implement and evaluate this technique in a real-world test-bed. Results show that by exploiting frequency diversity, this method may be used for secret key-establishment, notably when eavesdroppers may appear in advantageous locations. Adding defensive jamming is also shown to be an effective solution for boosting the secrecy level against non-detectable adversaries like eavesdroppers. | por |
dc.language.iso | eng | por |
dc.rights | openAccess | por |
dc.subject | Wireless Secrecy | por |
dc.title | Spread Spectrum and Jamming for Wireless Secrecy | por |
dc.type | masterThesis | por |
degois.publication.location | Coimbra | por |
degois.publication.title | Spread Spectrum and Jamming for Wireless Secrecy | por |
dc.identifier.tid | 201537796 | por |
thesis.degree.grantor | Universidade de Coimbra | por |
thesis.degree.name | Mestrado em Engenharia Informática | - |
uc.degree.grantorUnit | 0501 - Faculdade de Ciências e Tecnologia | por |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.openairetype | masterThesis | - |
item.languageiso639-1 | en | - |
item.fulltext | Com Texto completo | - |
item.cerifentitytype | Publications | - |
crisitem.advisor.orcid | 0000-0001-5805-1351 | - |
Appears in Collections: | UC - Dissertações de Mestrado FCTUC Eng.Informática - Teses de Mestrado |
Files in This Item:
File | Description | Size | Format | |
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Spread Spectrum and Jamming for Wireless Secrecy.pdf | 3.86 MB | Adobe PDF | View/Open |
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