Bit commitment from weak non-locality
Stefan Wolf, Jürg Wullschleger
So-called non-local boxes, which have been introduced as an idealizationndifferent respects - of the behavior of entangled quantum states, have been known to allow for unconditional bit commitment between the two involved parties. We show that, actually, any possible non-local correlation which produces random bits on both sides can be used to implement bit commitment, and that this holds even when the parties are allowed to delay their inputs to the box. Since a particular example is the behavior of an EPR pair, this resource allows for implementing unconditionally secure bit commitment as long as the parties cannot entangle their Qbits with any other system
IEEE Information Theory Workshop (ITW)•Dec 10, 2005•3 citations