Visible to the public Information-spectrum methods for information-theoretic security

TitleInformation-spectrum methods for information-theoretic security
Publication TypeConference Paper
Year of Publication2009
AuthorsBloch, M., Laneman, J. N.
Conference Name2009 Information Theory and Applications Workshop
Keywordschannel state information, complex communication scenarios, cryptography, ergodic fading channels, Fading, fading channels, feedback, Human Behavior, Information analysis, Information security, information theoretic security, Information theory, information-spectrum methods, information-theoretic security, Interference, jamming, Metrics, Mutual information, policy-based governance, pubcrawl, Random variables, Resiliency, Scalability, secrecy capacity, secure rates, telecommunication security, wiretap channels
AbstractWe investigate the potential of an information-spectrum approach to information-theoretic security. We show how this approach provides conceptually simple yet powerful results that can be used to investigate complex communication scenarios. In particular, we illustrate the usefulness of information-spectrum methods by analyzing the effect of channel state information (CSI) on the secure rates achievable over wiretap channels. We establish a formula for secrecy capacity, which we then specialize to compute achievable rates for ergodic fading channels in the presence of imperfect CSI. Our results confirm the importance of having some knowledge about the eavesdropper's channel, but also show that imperfect CSI does not necessarily preclude security.
Citation Keybloch_information-spectrum_2009