5,119 research outputs found
Quantum Private Comparison: A Review
As an important branch of quantum secure multiparty computation, quantum
private comparison (QPC) has attracted more and more attention recently. In
this paper, according to the quantum implementation mechanism that these
protocols used, we divide these protocols into three categories: The quantum
cryptography QPC, the superdense coding QPC, and the entanglement swapping QPC.
And then, a more in-depth analysis on the research progress, design idea, and
substantive characteristics of corresponding QPC categories is carried out,
respectively. Finally, the applications of QPC and quantum secure multi-party
computation issues are discussed and, in addition, three possible research
mainstream directions are pointed out
Plasmonics for emerging quantum technologies
Expanding the frontiers of information processing technologies and, in
particular, computing with ever increasing speed and capacity has long been
recognized an important societal challenge, calling for the development of the
next generation of quantum technologies. With its potential to exponentially
increase computing power, quantum computing opens up possibilities to carry out
calculations that ordinary computers could not finish in the lifetime of the
Universe, while optical communications based on quantum cryptography become
completely secure. At the same time, the emergence of Big Data and the ever
increasing demands of miniaturization and energy saving technologies bring
about additional fundamental problems and technological challenges to be
addressed in scientific disciplines dealing with light-matter interactions. In
this context, quantum plasmonics represents one of the most promising and
fundamental research directions and, indeed, the only one that enables ultimate
miniaturization of photonic components for quantum optics when being taken to
extreme limits in light-matter interactions.Comment: To appear in Nanophotonic
Low Cost and Compact Quantum Cryptography
We present the design of a novel free-space quantum cryptography system,
complete with purpose-built software, that can operate in daylight conditions.
The transmitter and receiver modules are built using inexpensive off-the-shelf
components. Both modules are compact allowing the generation of renewed shared
secrets on demand over a short range of a few metres. An analysis of the
software is shown as well as results of error rates and therefore shared secret
yields at varying background light levels. As the system is designed to
eventually work in short-range consumer applications, we also present a use
scenario where the consumer can regularly 'top up' a store of secrets for use
in a variety of one-time-pad and authentication protocols.Comment: 18 pages, 9 figures, to be published in New Journal of Physic
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