Analysis of False CSI Attack by a Malicious User in OFDMA Networks

WANG Xiaowei; TAO Meixia; XU Youyun

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Analysis of False CSI Attack by a Malicious User in OFDMA Networks

WANG Xiaowei 1,TAO Meixia 1 * #,XU Youyun 2

1.Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 2002402

2.Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 2002402；Nanjing Institute of Communications Engineering, PLA University of Science&Technology, Nanjing 210007

*Correspondence author

#Submitted by

Subject:

Funding: ***Foundation （No.00000000）

Opened online:23 December 2011

Accepted by: none

Citation: WANG Xiaowei,TAO Meixia,XU Youyun.Analysis of False CSI Attack by a Malicious User in OFDMA Networks[OL]. [23 December 2011] http://en.paper.edu.cn/en_releasepaper/content/4455950

Providing physical-layer security for future wireless networks isof both theoretical and practical importance.In this paper, we consider OFDMAnetworks which can fully guarantee the confidential message transmissionof each user.We present a malicious and active eavesdropper, which is registeredin the OFDMA network and reports a false channel state information (CSI)to the base station (BS) in order to obtain chance of eavesdrop.The detriment to the system security caused by the false CSI attack is evaluated.To combat the attack of the malicious user, two defence schemes at the BSare proposed and their efficiency is analyzed, which are CSI compensation andartificial noise.%Numerical studies are conducted to show the performance of the two defenceschemes, which are shown to effectively reduce the eavesdrop probability andsecrecy loss.

Keywords:Communication and Information System;Physical-Layer Security;OFDMA;False CSI Attack

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