Unconditionally Secure Bit Commitment
نویسندگان
چکیده
منابع مشابه
Unconditionally Secure Bit Commitment
We describe a new classical bit commitment protocol based on cryptographic constraints imposed by special relativity. The protocol is unconditionally secure against classical or quantum attacks. It evades the no-go results of Mayers, Lo and Chau by using a sequence of messages which includes a further verification stage after bit revelation. PACS numbers: 03.67.-a, 03.67.Dd, 89.70.+c Electronic...
متن کاملUnconditionally Secure Quantum Bit Commitment
Lo and Chau, and independently Mayers, have shown that all quantum bit commitment schemes proposed to date are insecure: one or both participants can cheat if they have a quantum computer. They claim also to have demonstrated that unconditionally secure quantum bit commitment is impossible. However, their no-go arguments rely on models of quantum cryptographic protocols which are insufficiently...
متن کاملExperimental unconditionally secure bit commitment.
Quantum physics allows for unconditionally secure communication between parties that trust each other. However, when the parties do not trust each other such as in the bit commitment scenario, quantum physics is not enough to guarantee security unless extra assumptions are made. Unconditionally secure bit commitment only becomes feasible when quantum physics is combined with relativistic causal...
متن کاملQuantum Bit Commitment can be Unconditionally Secure
It is generally believed that unconditionally secure quantum bit commitment is ruled out in principle by a “no-go theorem”. We point out that the theorem only establishes the existence of a cheating unitary operator in any scheme of quantum bit commitment, however there is no proof that the unitary operator is always known to the cheating party, hence it does not necessarily follow that quantum...
متن کاملUnconditionally Secure Quantum Bit Commitment Is Possible
Bit commitment involves the submission of evidence from one party to another so that the evidence can be used to confirm a later revealed bit value by the first party, while the second party cannot determine the bit value from the evidence alone. An unconditionally secure bit commitment protocol utilizing quantum states is presented. The generality of previous proofs on the impossibility of qua...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1999
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.83.1447