9,359 research outputs found
Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey
This paper provides a comprehensive review of the domain of physical layer
security in multiuser wireless networks. The essential premise of
physical-layer security is to enable the exchange of confidential messages over
a wireless medium in the presence of unauthorized eavesdroppers without relying
on higher-layer encryption. This can be achieved primarily in two ways: without
the need for a secret key by intelligently designing transmit coding
strategies, or by exploiting the wireless communication medium to develop
secret keys over public channels. The survey begins with an overview of the
foundations dating back to the pioneering work of Shannon and Wyner on
information-theoretic security. We then describe the evolution of secure
transmission strategies from point-to-point channels to multiple-antenna
systems, followed by generalizations to multiuser broadcast, multiple-access,
interference, and relay networks. Secret-key generation and establishment
protocols based on physical layer mechanisms are subsequently covered.
Approaches for secrecy based on channel coding design are then examined, along
with a description of inter-disciplinary approaches based on game theory and
stochastic geometry. The associated problem of physical-layer message
authentication is also introduced briefly. The survey concludes with
observations on potential research directions in this area.Comment: 23 pages, 10 figures, 303 refs. arXiv admin note: text overlap with
arXiv:1303.1609 by other authors. IEEE Communications Surveys and Tutorials,
201
Lime: Data Lineage in the Malicious Environment
Intentional or unintentional leakage of confidential data is undoubtedly one
of the most severe security threats that organizations face in the digital era.
The threat now extends to our personal lives: a plethora of personal
information is available to social networks and smartphone providers and is
indirectly transferred to untrustworthy third party and fourth party
applications.
In this work, we present a generic data lineage framework LIME for data flow
across multiple entities that take two characteristic, principal roles (i.e.,
owner and consumer). We define the exact security guarantees required by such a
data lineage mechanism toward identification of a guilty entity, and identify
the simplifying non repudiation and honesty assumptions. We then develop and
analyze a novel accountable data transfer protocol between two entities within
a malicious environment by building upon oblivious transfer, robust
watermarking, and signature primitives. Finally, we perform an experimental
evaluation to demonstrate the practicality of our protocol
The role of Signal Processing in Meeting Privacy Challenges [an overview]
International audienceWith the increasing growth and sophistication of information technology, personal information is easily accessible electronically. This flood of released personal data raises important privacy concerns. However, electronic data sources exist to be used and have tremendous value (utility) to their users and collectors, leading to a tension between privacy and utility. This article aims to quantify that tension by means of an information-theoretic framework and motivate signal processing approaches to privacy problems. The framework is applied to a number of case studies to illustrate concretely how signal processing can be harnessed to provide data privacy
Literature Study On Cloud Based Healthcare File Protection Algorithms
There is a huge development in Computers and Cloud computing technology, the trend in recent years is to outsource information storage on Cloud-based services. The cloud provides large storage space. Cloud-based service providers such as Dropbox, Google Drive, are providing users with infinite and low-cost storage. In this project we aim at presenting a protection method through by encrypting and decrypting the files to provide enhanced level of protection. To encrypt the file that we upload in cloud, we make use of double encryption technique. The file is been encrypted twice one followed by the other using two algorithms. The order in which the algorithms are used is that, the file is first encrypted using AES algorithm, now this file will be in the encrypted format and this encrypted file is again encrypted using RSA algorithm. The corresponding keys are been generated during the execution of the algorithm. This is done in order to increase the security level. The various parameters that we have considered here are security level, speed, data confidentiality, data integrity and cipher text size. Our project is more efficient as it satisfies all the parameters whereas the conventional methods failed to do so. The Cloud we used is Dropbox to store the content of the file which is in the encrypted format using AES and RSA algorithms and corresponding key is generated which can be used to decrypt the file. While uploading the file the double encryption technique is been implemented
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