The General Gaussian Multiple-Access and Two-Way Wiretap Channels: Achievable Rates and Cooperative Jamming

By Ender Tekin, Aylin Yener. IEEE Transactions on Information Theory, 2007

788 citations recorded by the source corpus.

The general Gaussian multiple-access wiretap channel (GGMAC-WT) and the Gaussian two-way wiretap channel (GTW-WT) are considered. In the GGMAC-WT, multiple users communicate with an intended receiver in the presence of an eavesdropper who receives their signals through another GMAC. In the GTW-WT, two users communicate with each other over a common Gaussian channel, with an eavesdropper listening through a GMAC. A secrecy measure that is suitable for this multiterminal environment is defined, and achievable secrecy rate regions are found for both channels. For both cases, the power allocations maximizing the achievable secrecy sum rate are determined. It is seen that the optimum policy may prevent some terminals from transmission in order to preserve the secrecy of the system. Inspired by this construct, a new scheme cooperative jamming is proposed, where users who are prevented from transmitting according to the secrecy sum rate maximizing power allocation policy ldquojamrdquo the eavesdropper, thereby helping the remaining users. This scheme is shown to increase the achievable secrecy sum rate. Overall, our results show that in multiple-access scenarios, users can help each other to collectively achieve positive secrecy rates. In other words, cooperation among users can be invaluable for achieving secrecy for the system.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/84ffe56f4767a79ed69d41c4dbb581a1ce410fde

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Citations in the corpus

Physical Layer Security for Next Generation Wireless Networks: Theories, Technologies, and Challenges (2017, background): “Reference [68] found that the two-way channel can be decomposed into two parallel channels, and the relay needs to perform double-user decoding, while each terminal only needs to decode a single user message.”
Optimal Relay Selection for Physical-Layer Security in Cooperative Wireless Networks (2013, background): “The cooperative jamming was proposed in [12] and analyzed in terms of the achievable secrecy rate, where multiple users are allowed to cooperate with each other in preventing the eavesdropping attack.”
Secure Transmission With Artificial Noise Over Fading Channels: Achievable Rate and Optimal Power Allocation (2010, background): “The use of interference for secrecy is also extended to multiple-access and broadcast channels with user cooperation [18–20].”
Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey (2010, methodology): “In [93], [94], a two-way wiretap channel is considered, in which both the source and receiver transmit information ove r the channel to each other in the presence of a wiretapper.”
Classifications and Applications of Physical Layer Security Techniques for Confidentiality: A Comprehensive Survey (2019, background): “Tekin and Yener [149], [163] proposed an interesting interference technique in which the transmitted interference signals are independent of the message.”
Relay selection for secure cooperative networks with jamming (2009, methodology): “Alternatively, jamming techniques which produce an artificial interference at the eavesdropper node in order to reduce the capacity of the related link seem to be an interesting approach for practical applications [17]-[19].”
On Cooperative Relaying Schemes for Wireless Physical Layer Security (2010, background): “A generalization of [16] and [17] was proposed in [18], in whi ch the helper transmits signals from another source encoder.”
Robust Beamforming for Security in MIMO Wiretap Channels With Imperfect CSI (2010, background): “We note that a similar approach can be taken to study the impact of imperfect CSI on schemes that make use of relays or neighboring users to jam eavesdroppers [19]-[23].”