15,126 research outputs found
Survey and Systematization of Secure Device Pairing
Secure Device Pairing (SDP) schemes have been developed to facilitate secure
communications among smart devices, both personal mobile devices and Internet
of Things (IoT) devices. Comparison and assessment of SDP schemes is
troublesome, because each scheme makes different assumptions about out-of-band
channels and adversary models, and are driven by their particular use-cases. A
conceptual model that facilitates meaningful comparison among SDP schemes is
missing. We provide such a model. In this article, we survey and analyze a wide
range of SDP schemes that are described in the literature, including a number
that have been adopted as standards. A system model and consistent terminology
for SDP schemes are built on the foundation of this survey, which are then used
to classify existing SDP schemes into a taxonomy that, for the first time,
enables their meaningful comparison and analysis.The existing SDP schemes are
analyzed using this model, revealing common systemic security weaknesses among
the surveyed SDP schemes that should become priority areas for future SDP
research, such as improving the integration of privacy requirements into the
design of SDP schemes. Our results allow SDP scheme designers to create schemes
that are more easily comparable with one another, and to assist the prevention
of persisting the weaknesses common to the current generation of SDP schemes.Comment: 34 pages, 5 figures, 3 tables, accepted at IEEE Communications
Surveys & Tutorials 2017 (Volume: PP, Issue: 99
Application of an all-solid-state, frequency-doubled Nd:YAP laser to the generation of twin beams at 1080 nm
A laser-diode-pumped intracavity frequency-doubled Nd:YAP/KTP laser is
presented. Over 110 mw of TEM00 single-frequency output power at 540-nm
wavelength was obtained. The output green laser was employed to pump a
semimonolithic nondegenerate optical parametric oscillator to produce intensity
quantum correlated twin beams at 1080 nm, and the maximum quantum noise
squeezing of 74 %(5.9 dB) on the intensity difference fluctuation between the
twin beams is observed. The threshold was reduced and the stability was
increased significantly when compared with similar lamp-pumped systems.Comment: Published on April 200
Towards Einstein-Podolsky-Rosen quantum channel multiplexing
A single broadband squeezed field constitutes a quantum communication
resource that is sufficient for the realization of a large number N of quantum
channels based on distributed Einstein-Podolsky-Rosen (EPR) entangled states.
Each channel can serve as a resource for, e.g. independent quantum key
distribution or teleportation protocols. N-fold channel multiplexing can be
realized by accessing 2N squeezed modes at different Fourier frequencies. We
report on the experimental implementation of the N=1 case through the
interference of two squeezed states, extracted from a single broadband squeezed
field, and demonstrate all techniques required for multiplexing (N>1). Quantum
channel frequency multiplexing can be used to optimize the exploitation of a
broadband squeezed field in a quantum information task. For instance, it is
useful if the bandwidth of the squeezed field is larger than the bandwidth of
the homodyne detectors. This is currently a typical situation in many
experiments with squeezed and two-mode squeezed entangled light.Comment: 4 pages, 4 figures. In the new version we cite recent experimental
work bei Mehmet et al., arxiv0909.5386, in order to clarify the motivation of
our work and its possible applicatio
Quantum Communication Systems: Vision, Protocols, Applications, and Challenges
The growth of modern technological sectors have risen to such a spectacular
level that the blessings of technology have spread to every corner of the
world, even to remote corners. At present, technological development finds its
basis in the theoretical foundation of classical physics in every field of
scientific research, such as wireless communication, visible light
communication, machine learning, and computing. The performance of the
conventional communication systems is becoming almost saturated due to the
usage of bits. The usage of quantum bits in communication technology has
already surpassed the limits of existing technologies and revealed to us a new
path in developing technological sectors. Implementation of quantum technology
over existing system infrastructure not only provides better performance but
also keeps the system secure and reliable. This technology is very promising
for future communication systems. This review article describes the
fundamentals of quantum communication, vision, design goals, information
processing, and protocols. Besides, quantum communication architecture is also
proposed here. This research included and explained the prospective
applications of quantum technology over existing technological systems, along
with the potential challenges of obtaining the goal.Comment: 23 pages, 11 Figure
5G: 2020 and Beyond
The future society would be ushered in a new communication era with the emergence of 5G. 5G would be significantly different, especially, in terms of architecture and operation in comparison with the previous communication generations (4G, 3G...). This book discusses the various aspects of the architecture, operation, possible challenges, and mechanisms to overcome them. Further, it supports users? interac- tion through communication devices relying on Human Bond Communication and COmmunication-NAvigation- SENsing- SErvices (CONASENSE).Topics broadly covered in this book are; β’ Wireless Innovative System for Dynamically Operating Mega Communications (WISDOM)β’ Millimeter Waves and Spectrum Managementβ’ Cyber Securityβ’ Device to Device Communicatio
An Analysis of Factors That Have Influenced the Evolution of Information Assurance from World War I through Vietnam to the Present
This study is an exploratory historical analysis of the factors that have influenced the evolution of military Information Assurance (IA) programs from World War I to the present. Although the term IA has recently been widely used throughout the Information Resource Management field (IRM), evidence indicates that information and information systems protection mechanisms were used during every U.S. Military conflict. This research proposes to increase the body of knowledge within the information systems management field by exploring the areas related to Information Assurance (IA) and the ultimate goal of U. S. Defensive Information Warfare. I found that significant events related to the protection of information and information systems security led to certain levels of IA being explored throughout each U.S. Military conflict. The evaluation of these events provides key information that reveals a common approach to IA throughout history and supports the identification of key concepts that have influenced this evolutionary process and shaped the role of IA in current military operations, with indicators of how it may be used in the future
Morphological plasticity of astroglia: Understanding synaptic microenvironment
Memory formation in the brain is thought to rely on the remodeling of synaptic connections which eventually results in neural network rewiring. This remodeling is likely to involve ultrathin astroglial protrusions which often occur in the immediate vicinity of excitatory synapses. The phenomenology, cellular mechanisms, and causal relationships of such astroglial restructuring remain, however, poorly understood. This is in large part because monitoring and probing of the underpinning molecular machinery on the scale of nanoscopic astroglial compartments remains a challenge. Here we briefly summarize the current knowledge regarding the cellular organisation of astroglia in the synaptic microenvironment and discuss molecular mechanisms potentially involved in use-dependent astroglial morphogenesis. We also discuss recent observations concerning morphological astroglial plasticity, the respective monitoring methods, and some of the newly emerging techniques that might help with conceptual advances in the area. GLIA 2015
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