Quantum digital signatures with quantum key distribution components
arXiv:1403.5551 · doi:10.1103/PhysRevA.91.042304
Abstract
Digital signatures guarantee the authenticity and transferability of messages, and are widely used in modern communication. The security of currently used classical digital signature schemes, however, relies on computational assumptions. In contrast, quantum digital signature (QDS) schemes offer information-theoretic security guaranteed by the laws of quantum mechanics. We present two QDS protocols which have the same experimental requirements as quantum key distribution, which is already commercially available. We also present the first security proof for any QDS scheme against coherent forging attacks.
13 pages. In v2 we included the first proof of security of a QDS protocol against coherent forging attacks. Many other smaller changes
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