Finite key size analysis of two-way quantum cryptography
Quantum Physics
2015-05-01 v1
Abstract
Quantum cryptographic protocols solve the longstanding problem of distributing a shared secret string to two distant users by typically making use of one-way quantum channel. However, alternative protocols exploiting two-way quantum channel have been proposed for the same goal and with potential advantages. Here we overview a security proof for two-way quantum key distribution protocols, against the most general eavesdropping attack, that utilize an entropic uncertainty relation. Then, by resorting to the `smooth' version of involved entropies, we extend such a proof to the case of finite key size. The results will be compared to those available for one-way protocols showing some advantages.
Cite
@article{arxiv.1503.01498,
title = {Finite key size analysis of two-way quantum cryptography},
author = {Jesni Shamsul Shaari and Stefano Mancini},
journal= {arXiv preprint arXiv:1503.01498},
year = {2015}
}