Journal ArticleDOI
Quantum cryptography based on Bell's theorem.
TLDR
Practical application of the generalized Bells theorem in the so-called key distribution process in cryptography is reported, based on the Bohms version of the Einstein-Podolsky-Rosen gedanken experiment andBells theorem is used to test for eavesdropping.Abstract:
Practical application of the generalized Bells theorem in the so-called key distribution process in cryptography is reported. The proposed scheme is based on the Bohms version of the Einstein-Podolsky-Rosen gedanken experiment and Bells theorem is used to test for eavesdropping. © 1991 The American Physical Society.read more
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Journal ArticleDOI
Single-photon sources
TL;DR: In this article, the authors survey the state-of-the-art in the design, development and application of devices for deterministically generating single photons on demand, both the defined function and the requisite form of such sources are explained in detail.
Journal ArticleDOI
Quantum cryptography with twisted photons through an outdoor underwater channel.
Frédéric Bouchard,Alicia Sit,Felix Hufnagel,Aazad Abbas,Yingwen Zhang,Khabat Heshami,Robert Fickler,Christoph Marquardt,Gerd Leuchs,Robert W. Boyd,Ebrahim Karimi +10 more
TL;DR: The effect of turbulence on an underwater quantum channel using twisted photons in outdoor conditions is investigated, and different quantum cryptographic protocols in an underwaterquantum channel are compared, showing the feasibility of high-dimensional encoding schemes.
Journal ArticleDOI
Communication channels secured from eavesdropping via transmission of photonic Bell states
Kaoru Shimizu,Nobuyuki Imoto +1 more
TL;DR: A quantum communication scheme for sending a definite binary sequence while confirming the security of the transmission and a pair of entangled photon twins is employed as a bit carrier which is encoded in a two-term superposition of four Bell states.
Journal ArticleDOI
Trusted Noise in Continuous-Variable Quantum Key Distribution: A Threat and a Defense
Vladyslav C. Usenko,Radim Filip +1 more
TL;DR: In this paper, the role of phase-insensitive trusted preparation and detection noise in the security of a continuous-variable quantum key distribution is discussed. But the authors do not consider the effect of such a noise on the security properties of Gaussian quantum cryptography, due to a strongly nonlinear behavior of the quantum entropies involved in security analysis.
Journal ArticleDOI
Quantum vernam cipher
TL;DR: Parts of secure quantum communication are discussed by proposing and analyzing a quantum analog of the Vernam cipher (one-time-pad), which shows that key recycling is intrinsic to the quantum cipher-text, rather than using entanglement as the key.