How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages

The model for a broadcast channel with confidential messages (BC-CM) plays an important role in the physical layer security of modern communication systems. In recent years, it has been shown that a noiseless feedback channel from the legitimate receiver to the transmitter increases the secrecy capa...

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Main Authors:	Xin Li, Bin Dai, Zheng Ma
Format:	Article
Language:	English
Published:	MDPI AG 2017-10-01
Series:	Entropy
Subjects:	broadcast channel with confidential messages noiseless feedback secrecy capacity region source coding with side information
Online Access:	https://www.mdpi.com/1099-4300/19/10/529

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spelling	doaj-c81a2692b6d34eb79d6a57165627e5722020-11-25T00:20:27ZengMDPI AGEntropy1099-43002017-10-01191052910.3390/e19100529e19100529How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential MessagesXin Li0Bin Dai1Zheng Ma2School of Information Science and Technology, Southwest JiaoTong University, Chengdu 611756, ChinaSchool of Information Science and Technology, Southwest JiaoTong University, Chengdu 611756, ChinaSchool of Information Science and Technology, Southwest JiaoTong University, Chengdu 611756, ChinaThe model for a broadcast channel with confidential messages (BC-CM) plays an important role in the physical layer security of modern communication systems. In recent years, it has been shown that a noiseless feedback channel from the legitimate receiver to the transmitter increases the secrecy capacity region of the BC-CM. However, at present, the feedback coding scheme for the BC-CM only focuses on producing secret keys via noiseless feedback, and other usages of the feedback need to be further explored. In this paper, we propose a new feedback coding scheme for the BC-CM. The noiseless feedback in this new scheme is not only used to produce secret keys for the legitimate receiver and the transmitter but is also used to generate update information that allows both receivers (the legitimate receiver and the wiretapper) to improve their channel outputs. From a binary example, we show that this full utilization of noiseless feedback helps to increase the secrecy level of the previous feedback scheme for the BC-CM.https://www.mdpi.com/1099-4300/19/10/529broadcast channel with confidential messagesnoiseless feedbacksecrecy capacity regionsource coding with side information
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Xin Li Bin Dai Zheng Ma
spellingShingle	Xin Li Bin Dai Zheng Ma How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages Entropy broadcast channel with confidential messages noiseless feedback secrecy capacity region source coding with side information
author_facet	Xin Li Bin Dai Zheng Ma
author_sort	Xin Li
title	How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages
title_short	How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages
title_full	How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages
title_fullStr	How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages
title_full_unstemmed	How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages
title_sort	how can we fully use noiseless feedback to enhance the security of the broadcast channel with confidential messages
publisher	MDPI AG
series	Entropy
issn	1099-4300
publishDate	2017-10-01
description	The model for a broadcast channel with confidential messages (BC-CM) plays an important role in the physical layer security of modern communication systems. In recent years, it has been shown that a noiseless feedback channel from the legitimate receiver to the transmitter increases the secrecy capacity region of the BC-CM. However, at present, the feedback coding scheme for the BC-CM only focuses on producing secret keys via noiseless feedback, and other usages of the feedback need to be further explored. In this paper, we propose a new feedback coding scheme for the BC-CM. The noiseless feedback in this new scheme is not only used to produce secret keys for the legitimate receiver and the transmitter but is also used to generate update information that allows both receivers (the legitimate receiver and the wiretapper) to improve their channel outputs. From a binary example, we show that this full utilization of noiseless feedback helps to increase the secrecy level of the previous feedback scheme for the BC-CM.
topic	broadcast channel with confidential messages noiseless feedback secrecy capacity region source coding with side information
url	https://www.mdpi.com/1099-4300/19/10/529
work_keys_str_mv	AT xinli howcanwefullyusenoiselessfeedbacktoenhancethesecurityofthebroadcastchannelwithconfidentialmessages AT bindai howcanwefullyusenoiselessfeedbacktoenhancethesecurityofthebroadcastchannelwithconfidentialmessages AT zhengma howcanwefullyusenoiselessfeedbacktoenhancethesecurityofthebroadcastchannelwithconfidentialmessages
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How Can We Fully Use Noiseless Feedback to Enhance the Security of the Broadcast Channel with Confidential Messages

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