Title: PowerPoint Presentation Author: hoi_kwong Last modified by: Hoi-Kwong Lo Created Date: 1/18/2002 4:39:54 PM Document presentation format: On-screen Show
1. Decoy State Quantum Key Distribution (QKD) Hoi-Kwong Lo ... Bennett and Brassard's scheme (BB84) ASSSUMPTIONS: Source: Emits perfect single photons. ...
Suppose photon has polarisation at angle q to a horizontal filter. ... They would both have the same polarisation so the security here would be broken. ...
To detect the effects of Eve, Alice selects a random subset of the ... Alice announces privacy amplification information to reduce Eve's information to zero. ...
JPL has capability to design and fabricate better SSPDs than anyone else. Motivation ... Improve coupling with E-beam fabricated diffractive optical element ...
Better Name Quantum Key Distribution (QKD) It's NOT a new ... Paper by Charles Bennett and Gilles Brassard in 1984 is the basis for QKD protocol BB84. ...
According to MIT Technology ... The perceived beauty of QKD: QKD solves the problem of key distribution. ... Security by experts vs security by enthusiasts. ...
QKD in infinite dimensional Hilbert space can make use of both coherent and entangled states Development of deterministic protocol in infinite dimensional Hilbert ...
In 1984 Bennett and Brassard proposed a protocol using quantum mechanics to ... Bennett and Brassard-First QKD protocol. Ekert and 1992-Bennett-New QKD protocol. ...
Quantum Channel University of ... Remind dense coding protocol! virtual entanglement Two-way quantum channel for QubitKD was put forward by K. Bostrom & T ...
Conclusion Quantum cryptography means just the exchange of keys Actual transmission of data is done ... Physikalische Bl tter 55, 25 (1999) Nature Photonics 4 ...
Quantum Cryptography Nick Papanikolaou Introduction Quantum cryptography is the single most successful application of Quantum Computing/Information Theory.
Quantum Cryptography Nick Papanikolaou Third Year CSE Student npapanikolaou@iee.org http://www.dcs.warwick.ac.uk/~esvbb Introduction Quantum cryptography is the ...
... ready for practical application. Make physical devices ready for practical application. Provide necessary interfaces for the integration into existing applications ...
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... the photons, such as setting up a photo detector to read the code, makes the ... A group in Europe recently made the first quantum encrypted bank transaction. ...
Big commercial market. Short propagation delay. Polarization ... Virtual journal, more meetings focused on single photon detectors. Future, Summary (day ? ...
Quantum Cryptography Nick Papanikolaou nikos@dcs.warwick.ac.uk ... Measurement [2] If a photon is measured using the wrong polarization angle for the crystal, ...
Quantum Cryptography Nick Papanikolaou nikos@dcs.warwick.ac.uk The Art of Concealment To exchange sensitive information, encryption is used Encryption schemes in use ...
What is quantum computing? Exploiting the strange phenomena in quantum mechanics to process information. Quantum computers can be in a superposition of several states ...
Title: Kvantekryptografi med fotoner i optiske fibre Author: Dag Roar Hjelme Last modified by: Vadim Makarov Created Date: 4/12/1999 8:58:22 AM Document presentation ...
Eve knows 50% of each of their sifted keys. ... Flaw: If Eve can deactivate the interlock, she can open both ... Before that, there is no key for Eve to steal. ...
Attacks via optical loopholes. Norwegian University of Science and Technology. Trondheim ... Evanescent wave technology: Removed cladding Variable coupler ...
Quanum computing. What is quantum computation? New model of computing ... Graph automorphism problem. So the hidden subgroup of is the automorphism group of G ...
Quantum correlations and device-independent quantum information protocols Antonio Ac n N. Brunner, N. Gisin, Ll. Masanes, S. Massar, M. Navascu s, S. Pironio, V ...
From probabilistic to deterministic quantum cryptography. From qubit to ... Lemma: Optimal Eve's incoherent attack consists in. a balanced one for which x=x' ...
Quantum cryptography is the single most successful application of Quantum ... A calcite crystal can be used to recover the bits encoded into a stream of photons. ...
Norsk kryptoseminar, 17-18. oktober 2002. NTNU, Trondheim Quantum Cryptography Vadim Makarov and Dag R. Hjelme Institutt for fysikalsk elektronikk NTNU
Cryptography In the Bounded Quantum-Storage Model Ivan Damg rd, Louis Salvail, Christian Schaffner BRICS, University of rhus, DK Serge Fehr CWI, Amsterdam, NL
Unconditional Security of the Bennett 1992 quantum key-distribution protocol over ... An ideal photon counter that discriminates single photon one hand and multi ...
The Art of Concealment. To exchange sensitive information, encryption is used. Encryption schemes in use today are under serious threat by quantum computers ...
Alice informs Bob which bases were correct. Alice and Bob discard the data from ... Eve is able to learn a constant fraction of the bits by splitting a pulse ...
... Key Distribution The Science of Secret Communications LA ... monitor the quantum channel ... method of authentication for public channel. Biometrics? ...
BB84 Quantum Key Distribution Alice chooses random bitstrings a and b each of length (4+ )n, Alice encodes each bit ai as {|0,|1} if bi=0 and as {|+,|-} if bi=1,