Secure communications in filter bank multicarrier spread spectrum systems

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Title Secure communications in filter bank multicarrier spread spectrum systems
Publication Type dissertation
School or College College of Engineering
Department Electrical & Computer Engineering
Author Majid, Arslan Javaid
Date 2017
Description A fundamental characteristic of wireless communications is in their broadcast nature, which allows accessibility of information without placing restrictions on a user’s location. However, the ease of accessibility also makes it vulnerable to eavesdropping. This dissertation considers the security issues of spread spectrum systems and in this context, a secure information transmission system compromised of two main parts is presented. The first component makes use of the principle of reciprocity in frequency-selective wireless channels to derive a pair of keys for two legitimate parties. The proposed key generation algorithm allows for two asynchronous transceivers to derive a pair of similar keys. Moreover, a unique augmentation - called strongest path cancellation (SPC) - is applied to the keys and has been validated through simulation and real-world measurements to significantly boost the security level of the design. In the second part of the secure information transmission system, the concept of artificial noise is introduced to multicarrier spread spectrum systems. The keys generated in the first part of the protocol are used as spreading code sequences for the spread spectrum system. Artificial noise is added to further enhance the security of the communication setup. Two different attacks on the proposed security system are evaluated. First, a passive adversary following the same steps as the legitimate users to detect confidential information is considered. The second attack studies a more sophisticated adversary with significant blind detection capabilities.
Type Text
Publisher University of Utah
Subject Digital Signal Processing; Physical-layer Security; Wireless Communications
Dissertation Name Doctor of Philosophy
Language eng
Rights Management ©Arslan Javaid Majid
Format application/pdf
Format Medium application/pdf
ARK ark:/87278/s6r255rv
Setname ir_etd
ID 1347836
Reference URL https://collections.lib.utah.edu/ark:/87278/s6r255rv
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