Wireless information-theoretic security pdf

Wireless informationtheoretic security wits has been suggested as a robust security scheme, especially for infrastructureless networks. The topic of information theoretic security is introduced and the principal results in. Securing manet 4 wiretap channel under channel uncertainty compound wiretap channel broadcast layering approach broadcast channel with layered decoding and secrecy. The channel coding side of information theoretic security is referred to as physicallayer security. Mclaughlin abstract in part i of this twopart paper on con. Pdf wireless informationtheoretic security joao barros academia. This field explores possibilities of providing security in the physical layer using techniques from information. The wits project is centered around the following key objectives. In this model, eve has perfect access to the insecure channel, i. In this work, we provide new insights into the design of practical informationtheoretic cryptosystems. Firstly, from a theoretical point of view, we give a brief introduction into the existing information theoretic security criteria, such as the notions of. On the other hand, informationtheoretic or unconditional security gives us the.

Information theoretic security, gaussian channels, wireless channels, secrecy capacity. Security has been one of the most significant problems surrounding wireless communications, in large part due to the openness of wireless medium where eavesdropping can be easily accomplished. The first part presents an informationtheoretic problem formulation in which two legitimate partners communicate over a quasistatic fading channel and an eavesdropper observes their. Such conceptualization gives birth to implementation scenarios of informationtheoretic security an unconditionally secure cryptosystem, that is, even having unlimited computing resources. Wireless informationtheoretic security request pdf. Mclaughlin abstract in this twopart paper, we consider the transmission of con. Information theoretic paths forward in the wireless physical layer h. Pdf wireless informationtheoretic security part ii. Recently in wireless systems, one of the most fundamental issues is guaranteeing the confidentiality of the communication due to the broadcast nature of the system, 4. Based on an informationtheoretic formulation of the problem, in which two legitimates partners communicate over a quasistatic fading channel and an eavesdropper.

Shitz, information theoretic security, foundations and trends. Pdf informationtheoretic security in wireless networks. In this twopart paper, we consider the transmission of confidential data over wireless wiretap channels. Description wireless systems are susceptible to eavesdropping as an unwelcome result of the broadcast nature of the wireless medium. Mclaughlin are with gtcnrs umi 2958, metz, france, and also with the school of ece.

Outline 1 introduction of information theoretic security 2 basic wiretap channel main results on wiretap channel some example wiretap channels 3 an application. An informationtheoretic security metric for future. We demonstrate that the proposed metric is more reasonable than some existing metrics and it is highly sensitive to some basic parameters and. Mclaughlin, fellow, ieee abstractthis paper considers the transmission of con. This paper analyzes the security of future wireless communication system from an informationtheoretic point of view and proposes an overall security metric. This paper summarizes recent contributions of the authors and their coworkers in the area of informationtheoretic security. Information theoretic security for wireless channels theory and practice matthieu bloch. Information theoretic security foundations and trends in. Based on an informationtheoretic formulation of the problem. The basic wiretap channel model is considered first, and then several specific types of wiretap channels are considered, including gaussian, multiinput multioutput mimo, compound, and feedback wiretap channels, as well as the wiretap channel with side information.

Informationtheoretic security is a cryptosystem whose security derives purely from information theory. Section 3 addresses a user movement scenario and its impact on the key parameters of wireless informationtheoretic security, for a certain mobility model. Information theoretic security and privacy of information. The theoretical findings of wireless informationtheoretic security are extended to include the use of ldpc channel coding scheme as. Based on the insights from this analysis, a practical secure communication protocol is developed, which uses a fourstep procedure to ensure wireless informationtheoretic security. Physical layer security for emerging wireless networks. Covering theoretical models, analytical results, and the state of the art in research, it will be of interest to researchers, graduate students, and practitioners working in communications engineering.

In part i of this twopart paper on confidential communication over wireless channels, we studied the fundamental security limits of quasistatic fading channels from the point of view of outage secrecy capacity with perfect and imperfect channel. Based on the physical layer, wits considers quasistatic rayleigh fading instead of the classic gaussian wiretap scenario. Informationtheoretic security for wireless communications introduction. Citeseerx wireless informationtheoretic security part. For cipher, perfect secrecy requires a onetime pad. On measures of information theoretic security invited. Practical schemes for wireless informationtheoretic security are presented in part ii, which in some cases comes close to the secrecy capacity limits given in this paper. Prior exposure to information theory is a plus but not a requirement. With a particular focus on theoretical models and analytical results, leading researchers show how techniques derived from the principles of source and channel coding can provide new ways of addressing issues of data security, embedded security, privacy, and authentication in modern information systems. Communicating over wireless channels with information. Index terms, information theoretic security, gaussian channels, wireless channels, secrecy capacity, ldpc codes, secret key agreement matthieu bloch and steven w.

This paper presents a wireless informationtheoretic security wits scheme, which has been recently introduced as a robust physical layerbased security solution, especially for infrastructureless networks. The wireless broadcast channel, illustrated in figure 6, is define. An autonomic network of moving users was implemented via 802. This usually involves designing a communication system for a physical wiretap channel, introduced by wyner in 1, which produces a provably secure digital communication link. This article aims to provide an overview of research results in informationtheoretic security with multiple wireless transmitters, and focuses on distilling insights for designing. Information theoretic security and its applications. Information theoretic security university of maryland. Informationtheoretic physicallayer security has emerged in the past few years as a promising new approach to securing wireless communications. In part i of this twopart paper on confidential communication over wireless channels, we studied the fundamental security limits of quasistatic fading channels from the point of view of outage secrecy capacity with perfect and imperfect channel state information. Exploiting the noncommutativity of nonlinear operators.

Informationtheoretic security and cryptograph basic introduction to diffiehellman, aes, and sidechannel attacks. Information theoretic paths forward in the wireless. Information theoretic secrecy is extremely powerful. Wireless informationtheoretic security information.

Previously unpublished contributions in information theoretic security are solicited, including but not limited to. Wireless informationtheoretic security in an outdoor. Section 2 presents the concept of wireless informationtheoretic security and discusses its key parameters. Information theoretic approaches to privacy and security. Learn how information theoretic approaches can inform the design of more secure information systems and networks with this expert guide.

The cryptosystem is considered cryptanalytically unbreakable if the adversary does not have enough information to break the encryption. Various information metrics for security will be compared. Fortunately, the wireless medium also provides endowments including the temporal dispersion, the capability of signal superposition and other properties, to facilitate defending against eavesdropping. Still, many open questions remain to be addressed for a full integration of informationtheoretic security into future communication systems. Cambridge university press 97811072269 information theoretic security and privacy of information systems edited by rafael f. The information theoretic approach to achieving secure communication opens a promising new direction toward. Three themes are developed in parallel throughout the dissertation. Information theoretic security focuses on confidentiality issues, in which passive attacks are of primary concern. Information theoretic security at the physical layer no assumption on eves computational power no assumption on eves available information unbreakable, provable, and quanti. Wireless physicallayer security wireless communications and. This paper considers the transmission of confidential data over wireless channels. Cooperation and information theoretic security in wireless. Researches on information theoretic security try to find the bounds of the channel capacity in which the amount of information leaking to the eavesdropper asymptotically. While informationtheoretic security is stronger than computational security, it has long been considered impractical.