Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Wiretap"”.
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Algorithms and architecture for multiusers, multi-terminal, multi-layer information theoretic security
… considered in this thesis, build upon the "wiretap channel," a model for physical layer security proposed by A. Wyner in 1975. At a higher level, the protocols considered here can strengthen existing mechanisms for security by providing a new location based approach at the physical layer.In …
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Sparse graph codes for compression, sensing, and secrecy
… efficient, capacity-achieving codes for the wiretap channel, a model of communication that allows one to provide information-theoretic, rather than computational, security guarantees. Our main results include the introduction of a new security critertion which is an information-theoretic …
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Design and Analysis of Multilevel Coded Modulation for Multi-Node Networks
… for the discrete-input, Gaussian noise wiretap channels, a rate splitting method is proposed to allow a convenient construction of wiretap channel codes via a combination of two separate encoders operating on the data and the dither components. This technique leads naturally to the …
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Information-theoretic secret sharing: Fundamental limits and coding schemes via deep learning
… the secret sharing model and the Gaussian wiretap channel model. The main contribution of this dissertation is to take practical constraints into account. We consider a rate- limited public communication channel to account for bandwidth constraints and finite block length for practical …
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Physical Layer Security of Hybrid Millimeter-Wave and Free-Space Optical Systems for 5G and Beyond Networks
… many years, Wyner presented his model, aka the wiretap channel, where the fading channel impairments take place to secure the communication in the physical layer without the need for a secret key. Since then, the interest in wiretap channels has remarkably increased and also extended to other …
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Improving the transparency of government requests for user data from ICT companies
… of requirements for transparency reporting of wiretaps but with subsequent surveillance statutes with minimal reporting requirements and rapidly evolving Internet technologies, the gap in surveillance transparency grew. The Snowden disclosures in 2013 provided a peek into the surveillance …
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CODE SMOOTHING, UNIFORM DISTRIBUTIONS, AND APPLICATIONS
… and effective coding schemes for use in wiretap channel settings. We also study uniformity guarantees achievable through hash functions, using techniques closely related to code smoothing.In particular, we show that certain classes of linear and $k$-universal hash families provide strong …
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Resource allocation and physical layer security in wireless communication systems
… system in which a passive eavesdropper tries to wiretap the message of one or more users. First, the problem of secrecy rate balancing is investigated for a SISO downlink system in which transmission is performed over a set of parallel subchannels. Under the assumption that each subchannel is …
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Complexity and second moment of the mathematical theory of communication
… Wyner–Ziv Problem, multiple access channel, wiretap channel of type I, and broadcast channel. In each scenario, the adapted notions of block error probability and code rate approach their limits at the same paces as specified above.
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Polar Coding in Certain New Transmission Environments
Polar codes, introduced by Arikan in 2009, have attracted considerable interest as an asymptotically capacity-achieving code with sufficient performance advantages to merit inclusion in the 5G standard. Polar codes are constructed directly from an explicit model of the communication channel, so …