On the impossibility of non-static quantum bit commitment between

Jan 29, 2011 - In [14, 15], the MLC no-go theorem was proved in the following basic idea. Suppose the initial states of Alice and Bob are |b〉A (b âˆ...

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Jan 29, 2011 - 2Department of Computer Science, Sun Yat-sen University, Guangzhou 510006, China. 4. 3Department of Mathematics, Hong Kong Baptist ...

Mar 14, 1996 - The result of Mayers was more general than the one obtained by Lo and Chau, but both used the same basic idea. The result of Lo and. Chau did not encompass the BCJL protocol in which Bob can obtain an exponentially small amount of info

Jun 22, 2013 - A 377 (2013) 1076), the authors presented an impossibility proof of quantum bit commitment, which attempted to cover ... As pointed out in a recent letter [1],. “the debate can be only settled with an appropriate ... *Electronic addr

May 23, 2009 - tum cryptographers to find unconditionally secure quan- tum bit commitment protocols, in which—very much in parallel to quantum key distribution [11, 12]—security is guaranteed ...... the intersection between BTCi and Tni is non em

Jul 3, 2018 - after the commit phase. A BC scheme is unconditionally secure if and only ... reflectivity and transmissivity of the BS are R and T, where R + T = 1. The probabilities of ...... Rev Lett, 78, 3410-3413 (1997). [7] Brassard G ...

who initially share no information, to exchange information via quantum and classical channels, so as to end up sharing a secret key ... or declines in the stock market on a daily basis. To substantiate her claim .... over determinate possibilitiesâ€

sites has been shown to be impossible by Mayers [24] and Lo and. Chau [19, 20], but the claim is ... who initially share no information, to exchange information via quantum and classical channels, so as to end up ... ability to predict advances or de

Adrian Kent. Hewlett-Packard Laboratories, Filton Road,. Stoke Gifford, Bristol BS34 8QZ, U.K. and. Centre for Quantum Computation, DAMTP, Centre for ...

Apr 3, 2015 - We are motivated to address these questions both because they are practically relevant and because the answers illuminate the general properties of relativistic quantum information and its relationship to cryptography. Existing relativi

random bit, by “talking over the phone” [5]. When the two parties follow a protocol honestly, the bit they agree .... the two parties involved compete to “win” by getting a particular value of the coin as the outcome (say. Alice wins if the o

Feb 1, 2008 - subtle. Here we provide this first complete proof that the BCJL protocol is insecure. We have also considered several variations on the BCJL theme. Neither Lo and Chau's attack nor the correct attack on the BCJL protocol explained below

type entanglement cheating which supposedly rules out. QBC and other quantum protocols that have been pro- .... In the following, we describe the specific pro- tocol (which we call QBC4) that achieves unconditional security in .... free to choose any

Jun 19, 2002 - ∗Computer Science Department, and Institute for Quantum ... this work was done while this author was at DIMACS Center, Rutgers University,.

tially prepared in a seperable quantum state known to and furnished by the acceptor (Bob), rather than Alice. Classical communication is used to conclude the ...

The main reason is the fact that all proposed quantum bit commitment protocols require quantum memory. In this work, we show a quantum bit commitment ..... On the other hand, the probability of Alice cheating Bob, PA, is: (. ) ( ). ( ). ( ). ( ). ( )

Sep 15, 2009 - 2005-Y-001-05, “Develop- ments of next generation security technology” and Grant ... Acta 62, 363 (1989); L. P. Hugh- ston, R. Jozsa, and W. K. ...

In general, the commitment and unveiling follow a ... from the committed state and of B being able to extract ..... We can put |⊥〉 = α|A〉|0〉 + β|B〉|1〉 where.

Feb 15, 2012 - current technological limitations on the storage of qubits and on nondemolition measurements of ... 69978, Israel. Email: [email protected] .... The difference is that in this method Bob can perform an unlimited number of ...

Feb 15, 2012 - Abstract A quantum protocol for bit commitment the security of which is ... commitment scheme, Bob, without the key, cannot get any information about the ..... is higher (i.e. fidelity is lower) than that required for compliance.

Nov 9, 2006 - where Alice commits a string of n bits to Bob, in such a way that she ... and Bob can learn at most b bits of information before the reveal phase.

Jun 25, 2015 - We prove that the protocol is secure against quantum adversaries for a duration limited by the light-speed ... arXiv:1411.4917v2 [quant-ph] 25 Jun 2015 ..... x3 y1 y2 y3. Dt. Internet. GPS-receiver. PPS. 10 MHz. Optical link. 2.5 Gbs.

Nov 9, 2006 - 3School of Computer Science, McGill University, Montreal, Canada. 4Department of ... University of Toronto, Toronto, Canada M5G 3G4.

Aug 11, 2016 - speed of light in order to obtain security guarantees that cannot be achieved from the laws ... 1. arXiv:1608.03398v1 [quant-ph] 11 Aug 2016 ...

Quantum cryptography [1], the study of information security systems involving .... as it confirms our statement above that there can be no general impossibility ...