Secret-key reconciliation by public discussion
EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
Unconditional security in quantum cryptography
Journal of the ACM (JACM)
Efficient Quantum Key Distribution Scheme and a Proof of Its Unconditional Security
Journal of Cryptology
The universal composable security of quantum key distribution
TCC'05 Proceedings of the Second international conference on Theory of Cryptography
Finite-key analysis for quantum key distribution with decoy states
Quantum Information & Computation
Security of plug-and-play QKD arrangements with finite resources
Quantum Information & Computation
Asymmetric "4+2" protocol for quantum key distribution with finite resources
Quantum Information Processing
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A practical quantum key distribution (QKD) protocol necessarily runs in finite time and, hence, only a finite amount of communication is exchanged. This is in contrast to most of the standard results on the security of QKD, which only hold in the limit where the number of transmitted signals approaches infinity. Here, we analyze the security of QKD under the realistic assumption that the amount of communication is finite. At the level of the general formalism, we present new results that help simplifying the actual implementation of QKD protocols: in particular, we show that symmetrization steps, which are required by certain security proofs (e.g., proofs based on de Finetti's representation theorem), can be omitted in practical implementations. Also, we demonstrate how two-way reconciliation protocols can be taken into account in the security analysis. At the level of numerical estimates, we present the bounds with finite resources for "device-independent security" against collective attacks.