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Open AccessArticle

Attacks against a Simplified Experimentally Feasible Semiquantum Key Distribution Protocol

1
Département d’Informatique et de Recherche Opérationnelle (DIRO), Université de Montréal, Montréal, QC H3C 3J7, Canada
2
Computer Science Department, Technion, Haifa 3200003, Israel
*
Author to whom correspondence should be addressed.
Entropy 2018, 20(7), 536; https://doi.org/10.3390/e20070536
Received: 16 June 2018 / Revised: 10 July 2018 / Accepted: 16 July 2018 / Published: 18 July 2018
A semiquantum key distribution (SQKD) protocol makes it possible for a quantum party and a classical party to generate a secret shared key. However, many existing SQKD protocols are not experimentally feasible in a secure way using current technology. An experimentally feasible SQKD protocol, “classical Alice with a controllable mirror” (the “Mirror protocol”), has recently been presented and proved completely robust, but it is more complicated than other SQKD protocols. Here we prove a simpler variant of the Mirror protocol (the “simplified Mirror protocol”) to be completely non-robust by presenting two possible attacks against it. Our results show that the complexity of the Mirror protocol is at least partly necessary for achieving robustness. View Full-Text
Keywords: quantum key distribution; semiquantum key distribution; security; attack quantum key distribution; semiquantum key distribution; security; attack
MDPI and ACS Style

Boyer, M.; Liss, R.; Mor, T. Attacks against a Simplified Experimentally Feasible Semiquantum Key Distribution Protocol. Entropy 2018, 20, 536.

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