On the Secure Degrees of Freedom in the K-User Gaussian Interference Channel
arXiv:0805.1340 · doi:10.1109/ISIT.2008.4595013
Abstract
This paper studies the K-user Gaussian interference channel with secrecy constraints. Two distinct network models, namely the interference channel with confidential messages and the one with an external eavesdropper, are analyzed. Using interference alignment along with secrecy pre-coding at each transmitter, it is shown that each user in the network can achieve non-zero secure Degrees of Freedoms (DoFs) in both scenarios. In particular, the proposed coding scheme achieves (K-2)/(2K-2) secure DoFs for each user in the interference channel with confidential messages model, and (K-2)/2K secure DoFs in the case of an external eavesdropper. The fundamental difference between the two scenarios stems from the lack of channel state information (CSI) about the external eavesdropper. Remarkably, the results establish the positive impact of interference on the secrecy capacity of wireless networks.
Proceedings of the 2008 IEEE International Symposium on Information Theory, Toronto, ON, Canada, July 6 - 11, 2008
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Cited by in corpus (13)
- Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey
- Robust Beamforming for Security in MIMO Wiretap Channels with Imperfect CSI
- MIMO Interference Alignment Over Correlated Channels with Imperfect CSI
- Multiuser Diversity for Secrecy Communications Using Opportunistic Jammer Selection -- Secure DoF and Jammer Scaling Law
- The Secrecy Rate Region of the Broadcast Channel
- Joint Power Control in Wiretap Interference Channels
- Secure Transmissions Using Artificial Noise in MIMO Wiretap Interference Channel: A Game Theoretic Approach
- Secrecy Rate Region of the Broadcast Channel with an Eavesdropper
- On the Secure Degrees of Freedom of Wireless X Networks
- Blind MIMOME Wiretap Channel with Delayed CSIT
- On the Secrecy Rate Region for the Interference Channel
- On the Secrecy Degress of Freedom of the Multi-Antenna Block Fading Wiretap Channels
- Cooperative encoding for secrecy in interference channels