Unconditional security from noisy quantum storage

Details Unconditional security from noisy quantum storage Unconditional security from noisy quantum storage

2009-06-05

arxiv.org/abs/0906.1030v4

Physics

Quantum Physics

25 pages (IEEE two column), 13 figures, v4: published version (to appear in IEEE Transactions on Information Theory), includin

Scientific paper

We consider the implementation of two-party cryptographic primitives based on the sole assumption that no large-scale reliable quantum storage is available to the cheating party. We construct novel protocols for oblivious transfer and bit commitment, and prove that realistic noise levels provide security even against the most general attack. Such unconditional results were previously only known in the so-called bounded-storage model which is a special case of our setting. Our protocols can be implemented with present-day hardware used for quantum key distribution. In particular, no quantum storage is required for the honest parties.

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