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International Symposium on Communications and Information Technologies

Secure wireless multicasting in presence of multiple eavesdroppers

Anish Prasad Shrestha, Jai-Jin Jung, Kyung Sup Kwak

Published Sep 1, 2013• 15 citations
Publisher

Abstract

Physical layer security schemes for wireless communication can prevent eavesdropping even without use of upper layer cryptographic algorithms. As such, physical layer security based on information theoretic constraint is gaining both theoretical and practical importance in research community. In this paper, we investigate the physical layer security for wireless multicasting scheme consisting of a single antenna transmitter with multiple receivers and eavesdroppers both equipped with multiple antennas under quasi-static Rayleigh fading channel. We develop new closed-form expressions for the analysis of probability of positive secrecy as well as outage probability. We show that the physical layer security can be maintained even in presence of multiple eavesdroppers consisting multiple antennas. Furthermore, we also analyze the effect of number of antennas, users and eavesdroppers in the numerical results.

DOI
10.1109/iscit.2013.6645929

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Physical layer security schemes for wireless communication can prevent eavesdropping even without use of upper layer cryptographic algorithms. As such, physical layer security based on information theoretic constraint is gaining both theoretical and practical importance in research community. In this paper, we investigate the physical layer security for wireless multicasting scheme consisting of a single antenna transmitter with multiple receivers and eavesdroppers both equipped with multiple antennas under quasi-static Rayleigh fading channel. We develop new closed-form expressions for the analysis of probability of positive secrecy as well as outage probability. We show that the physical layer security can be maintained even in presence of multiple eavesdroppers consisting multiple antennas. Furthermore, we also analyze the effect of number of antennas, users and eavesdroppers in the numerical results.
In this paper, a wireless multicast scenario is considered in which the transmitter sends a common message to multiple client receivers in the presence of an eavesdropper. We are interested in protecting this common message against eavesdropping. Based on an information-theoretic formulation of the problem, in which the transmitter and the mutually independent multiple client receivers communicate over quasi-static Rayleigh fading channels and an eavesdropper observes their transmissions through another quasi-static Rayleigh fading channel, we define the secrecy-sum capacity in terms of secure outage probability. Moreover, we also present a formulation of ergodic perfect secrecy multicast capacity at which the eavesdropper is unable to decode any information.
We analyze the physical layer security of a communication scheme with a multiple antenna legitimate transmitter, employing transmit antenna selection (TAS), and a single antenna legitimate receiver in the presence of a single antenna eavesdropper. We developed closed-form expressions for the analysis of the secrecy outage probability supposing independent and quasi-static Rayleigh fading channels. Our results show that the secrecy outage probability is considerably increased when multiple antennas are available at the legitimate transmitter. Moreover, due to the use of the TAS technique, the eavesdropper is not able to exploit the additional spatial diversity offered by the legitimate transmitter.
Abstract—We analyze the physical layer security of a commu-nication scheme with a multiple antenna legitimate transmitter, employing transmit antenna selection (TAS), and a single antenna legitimate receiver in the presence of a single antenna eaves-dropper. We developed closed-form expressions for the analysis of the secrecy outage probability supposing independent and quasi-static Rayleigh fading channels. Our results show that the secrecy outage probability is considerably increased when multiple antennas are available at the legitimate transmitter. Moreover, due to the use of the TAS technique, the eavesdropper is not able to exploit the additional spatial diversity offered by the legitimate transmitter. I.
This paper focuses on secure wireless multicasting under the employment of a Neyman-Pearson receiver, along with a selection combining (SC) diversity technique over a Rayleigh fading channel. SC diversity technique provides diversity gain by selecting the strongest received signal from several brunches. The authors aim to prevent eavesdropping of the sent signal by considering the number of eavesdroppers, multicast users, and receive and eavesdropper side antennas. In order to maintain confidentiality when there are numerous eavesdroppers present, the authors developed the closed-form analytical expression for the probability of non-zero secrecy multicast capacity (PNSMC) and secure outage probability for multicasting (SOPM). These mathematical models help provide insight into the effects of the aforementioned parameters. The numerical results show that security in a multicast network employing a Neyman-Pearson receiver with SC diversity technique is significantly affected by the receive and eavesdropper side antenna number, the amount of multicast user and eavesdropper, especially at low noise power region of the eavesdropper channel.
A secure multicasting framework is considered in this paper to investigate the secrecy performance of a single-input multiple-output (SIMO) system in which a single antenna source transmits private message to multiple receivers in the presence of multiple eavesdroppers. All the receivers and eavesdroppers are equipped with multiple antennas. The perfect secrecy is obtained when evasedroppers can not be able to decode any transmitted information. Considering independent and identically distributed (i.i.d) Rician-K fading channels, the mathematical expressions for the probability of non-zero secrecy multicast capacity, the ergodic secrecy multicast capacity and the secure outage probability for multicasting are derived in closed-forms. Numerical results are provided to show the impact of the diversity provided by the multiple antennas at the receivers. In addition, the impact of Rician factor, K on the secrecy capacity and outage behaviour of the proposed multicasting scenario is also demonstrated. The performance analysis includes the Rayleigh fading scenario as a special case of Rician-K fading channel and focuses the performance comparison between Rician-K and Rayleigh fading channels.
In this paper, a wireless multicast scenario is considered in which the transmitter sends a common message to a group of client receivers through quasi-static Rayleigh fading channel in the presence of an eavesdropper. The communication between transmitter and each client receiver is said to be secured if the eavesdropper is unable to decode any information. On the basis of an information-theoretic formulation of the confidential communications between transmitter and a group of client receivers, we define the expected secrecy sum-mutual information in terms of secure outage probability and provide a complete characterization of maximum transmission rate at which the eavesdropper is unable to decode any information. Moreover, we find the probability of non-zero secrecy mutual information and present an analytical expression for ergodic secrecy multicast mutual information of the proposed model.