31,457 research outputs found
Universal secure rank-metric coding schemes with optimal communication overheads
We study the problem of reducing the communication overhead from a noisy
wire-tap channel or storage system where data is encoded as a matrix, when more
columns (or their linear combinations) are available. We present its
applications to reducing communication overheads in universal secure linear
network coding and secure distributed storage with crisscross errors and
erasures and in the presence of a wire-tapper. Our main contribution is a
method to transform coding schemes based on linear rank-metric codes, with
certain properties, to schemes with lower communication overheads. By applying
this method to pairs of Gabidulin codes, we obtain coding schemes with optimal
information rate with respect to their security and rank error correction
capability, and with universally optimal communication overheads, when , being and the number of columns and number of rows,
respectively. Moreover, our method can be applied to other families of maximum
rank distance codes when . The downside of the method is generally
expanding the packet length, but some practical instances come at no cost.Comment: 21 pages, LaTeX; parts of this paper have been accepted for
presentation at the IEEE International Symposium on Information Theory,
Aachen, Germany, June 201
Cybersecurity in the Classroom: Bridging the Gap Between Computer Access and Online Safety
According to ISACA, there will be a global shortage of 2 million cybersecurity professionals worldwide by 2019. Additionally, according to Experian Data Breach Resolution, as much as 80% of all network breaches can be traced to employee negligence. These problems will not solve themselves, and they likewise won’t improve without drastic action. An effort needs to be made to help direct interested and qualified individuals to the field of cybersecurity to move toward closing this gap. Moreover, steps need to be made to better inform the public of general safety measures while online, including the safeguarding of sensitive information.
A large issue with solving the problems at hand is that there seems to be no comprehensive curriculum for cybersecurity education to teach these basic principles. In my paper, I review and compare several after- and in-school programs that attempt to address this problem. I’ve also interviewed teachers from Montgomery County Public Schools, a relatively ethnically diverse school district outside of Washington, D.C.
These issues need to be addressed, and while private organizations and local schools are attempting to tackle the problem, wider action may need to be taken at a national level to come to a resolution
Cybersecurity in the Classroom: Bridging the Gap Between Computer Access and Online Safety
According to ISACA, there will be a global shortage of 2 million cybersecurity professionals worldwide by 2019. Additionally, according to Experian Data Breach Resolution, as much as 80% of all network breaches can be traced to employee negligence. These problems will not solve themselves, and they likewise won’t improve without drastic action. An effort needs to be made to help direct interested and qualified individuals to the field of cybersecurity to move toward closing this gap. Moreover, steps need to be made to better inform the public of general safety measures while online, including the safeguarding of sensitive information.
A large issue with solving the problems at hand is that there seems to be no comprehensive curriculum for cybersecurity education to teach these basic principles. In my paper, I review and compare several after- and in-school programs that attempt to address this problem. I’ve also interviewed teachers from Montgomery County Public Schools, a relatively ethnically diverse school district outside of Washington, D.C.
These issues need to be addressed, and while private organizations and local schools are attempting to tackle the problem, wider action may need to be taken at a national level to come to a resolution
A high-speed multi-protocol quantum key distribution transmitter based on a dual-drive modulator
We propose a novel source based on a dual-drive modulator that is adaptable
and allows Alice to choose between various practical quantum key distribution
(QKD) protocols depending on what receiver she is communicating with.
Experimental results show that the proposed transmitter is suitable for
implementation of the Bennett and Brassard 1984 (BB84), coherent one-way (COW)
and differential phase shift (DPS) protocols with stable and low quantum bit
error rate. This could become a useful component in network QKD, where
multi-protocol capability is highly desirable.Comment: 15 pages, 7 figure
Field test of quantum key distribution in the Tokyo QKD Network
A novel secure communication network with quantum key distribution in a
metropolitan area is reported. Different QKD schemes are integrated to
demonstrate secure TV conferencing over a distance of 45km, stable long-term
operation, and application to secure mobile phones.Comment: 21 pages, 19 figure
Lists that are smaller than their parts: A coding approach to tunable secrecy
We present a new information-theoretic definition and associated results,
based on list decoding in a source coding setting. We begin by presenting
list-source codes, which naturally map a key length (entropy) to list size. We
then show that such codes can be analyzed in the context of a novel
information-theoretic metric, \epsilon-symbol secrecy, that encompasses both
the one-time pad and traditional rate-based asymptotic metrics, but, like most
cryptographic constructs, can be applied in non-asymptotic settings. We derive
fundamental bounds for \epsilon-symbol secrecy and demonstrate how these bounds
can be achieved with MDS codes when the source is uniformly distributed. We
discuss applications and implementation issues of our codes.Comment: Allerton 2012, 8 page
Continuous operation of high bit rate quantum key distribution
We demonstrate a quantum key distribution with a secure bit rate exceeding 1
Mbit/s over 50 km fiber averaged over a continuous 36-hours period. Continuous
operation of high bit rates is achieved using feedback systems to control path
length difference and polarization in the interferometer and the timing of the
detection windows. High bit rates and continuous operation allows finite key
size effects to be strongly reduced, achieving a key extraction efficiency of
96% compared to keys of infinite lengths.Comment: four pages, four figure
Finite-Block-Length Analysis in Classical and Quantum Information Theory
Coding technology is used in several information processing tasks. In
particular, when noise during transmission disturbs communications, coding
technology is employed to protect the information. However, there are two types
of coding technology: coding in classical information theory and coding in
quantum information theory. Although the physical media used to transmit
information ultimately obey quantum mechanics, we need to choose the type of
coding depending on the kind of information device, classical or quantum, that
is being used. In both branches of information theory, there are many elegant
theoretical results under the ideal assumption that an infinitely large system
is available. In a realistic situation, we need to account for finite size
effects. The present paper reviews finite size effects in classical and quantum
information theory with respect to various topics, including applied aspects
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