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Publication 2016



Schaefer, Rafael F. and Grigorescu, Andrea and Boche, Holger and Poor, H. Vincent (2016). Broadcast Channels with Confidential Messages: Channel Uncertainty, Robustness, and Continuity. Physical and Data-Link Security Techniques for Future Communication Systems. Springer International Publishing, 69–91.

Schaefer, Rafael F. and Boche, Holger and Poor, H. Vincent (2016). Arbitrarily Varying Channels–-A Model for Robust Communication in the Presence of Unknown Interference. Communications in Interference Limited Networks. Springer International Publishing, 259–283.

Journal Paper

Super-Activation as a Unique Feature of Secure Communication in Malicious Environments
Citation key info7020024
Author Schaefer, Rafael F. and Boche, Holger and Poor, H. Vincent
Pages 24
Year 2016
ISSN 2078-2489
DOI 10.3390/info7020024
Journal Information
Volume 7
Number 2
Abstract The wiretap channel models secure communication between two users in the presence of an eavesdropper who must be kept ignorant of transmitted messages. This communication scenario is studied for arbitrarily varying channels (AVCs), in which the legitimate users know only that the true channel realization comes from a pre-specified uncertainty set and that it varies from channel use to channel use in an arbitrary and unknown manner. This concept not only captures the case of channel uncertainty, but also models scenarios in which malevolent adversaries influence or jam the transmission of the legitimate users. For secure communication over orthogonal arbitrarily varying wiretap channels (AVWCs) it has been shown that the phenomenon of super-activation occurs; that is, there are orthogonal AVWCs, each having zero secrecy capacity, which allow for transmission with positive rate if they are used together. It is shown that for such orthogonal AVWCs super-activation is generic in the sense that whenever super-activation is possible, it is possible for all AVWCs in a certain neighborhood as well. As a consequence, a super-activated AVWC is robust and continuous in the uncertainty set, although a single AVWC might not be. Moreover, it is shown that the question of super-activation and the continuity of the secrecy capacity solely depends on the legitimate link. Accordingly, the single-user AVC is subsequently studied and it is shown that in this case, super-activation for non-secure message transmission is not possible making it a unique feature of secure communication over AVWCs. However, the capacity for message transmission of the single-user AVC is shown to be super-additive including a complete characterization. Such knowledge is important for medium access control and in particular resource allocation as it determines the overall performance of a system.
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Conference, Symposium and Workshop Papers

X. Yi and G. Caire (2016). Topological interference management with decoded message passing. 2016 IEEE International Symposium on Information Theory (ISIT), 550-554.

X. Yi and G. Caire (2016). Topological coded caching. 2016 IEEE International Symposium on Information Theory (ISIT), 2039-2043.

W. Yang and R. F. Schaefer and H. V. Poor (2016). Finite-blocklength bounds for wiretap channels. 2016 IEEE International Symposium on Information Theory (ISIT), 3087-3091.

X. Wang, R. F. Schaefer, L. Thiele, T. Haustein, and Y. Wang (2016). The Ergodic Secrecy Sum Rate for Multiuser MIMO Downlink Systems Using Block Diagonalization. 2016 IEEE Conference on Communications and Network Security (CNS)

R. J. Weiler and W. Keusgen and A. Maltsev and T. Kühne and A. Pudeyev and Liang Xian and J. Kim and M. Peter (2016). Millimeter-wave outdoor access shadowing mitigation using beamforming arrays. 2016 10th European Conference on Antennas and Propagation (EuCAP), 1-5.

Walk, P. and Jung, P. and Pfander, G. E. and Hassibi, B. (2016). Ambiguities of Convolutions with Application to Phase Retrieval Problems. Asilomar 2016, invited paper

Vural, M. and Jung, P. and Stanczak, S. (2016). On Some Physical Layer Design Approaches for MTC in Existing and Near-Future Small-Cell Networks. 20th International ITG Workshop on Smart Antennas (WSA16)

Stoeger, D. and Jung, P. and Krahmer, F. (2016). Blind deconvolution and Compressed Sensing. Cosera 2016

R. F. Schaefer and H. Boche and H. V. Poor (2016). Super-activation as a unique feature of arbitrarily varying wiretap channels. 2016 IEEE International Symposium on Information Theory (ISIT), 3077-3081.

Raceala-Motoc, M. and Schreck, J. and Jung, P. and Stanczak, S. (2016). Robust Message Recovery for Non-Cooperative Compute-and-Forward Relaying. Asilomar 2016

R. F. Schaefer, A. Khisti, and H. V. Poor (2016). Secure Broadcasting Over Parallel Channels with independent Secret Keys. 2016 Int. Zurich Seminar on Commun. (IZS), 116-120.

R. Bustin, M. Vaezi, R. F. Schaefer and H. V. Poor (2016). On the Secrecy Capacity of the Z-Interference Channel. 2016 Int. Zurich Seminar on Commun. (IZS), 190-194.

K. Mahler and W. Keusgen and F. Tufvesson and T. Zemen and G. Caire (2016). Propagation Channel in a Rural Overtaking Scenario with Large Obstructing Vehicles. 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring), 1-5.

P. H. Lin and E. A. Jorswieck and R. F. Schaefer and C. Janda and M. Mittelbach (2016). Degradedness and stochastic orders of fast fading Gaussian broadcast channels with statistical channel state information at the transmitter. 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 3846-3850.

P. H. Lin and E. A. Jorswieck and R. F. Schaefer (2016). On ergodic fading Gaussian interference channels with statistical CSIT. 2016 IEEE Information Theory Workshop (ITW), 454-458.

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