Exposed-key weakness of $\alpha \eta$
Quantum Physics
2009-11-13 v2
Abstract
The protocol given by Barbosa \emph{et al.}, PRL 90, 227901 (2003) claims to be a secure way of encrypting messages using mesoscopic coherent states. We show that transmission under exposes information about the secret key to an eavesdropper, and we estimate the rate at which an eavesdropper can learn about the key. We also consider the consequences of using further randomization to protect the key and how our analysis applies to this case. We conclude that is not informationally secure.
Cite
@article{arxiv.quant-ph/0612058,
title = {Exposed-key weakness of $\alpha \eta$},
author = {Charlene Ahn and Kevin Birnbaum},
journal= {arXiv preprint arXiv:quant-ph/0612058},
year = {2009}
}
Comments
6 pg. Was originally written in May 2006 and has languished in getting-approved-land for 7 months, but we've tried to keep current with papers published since then. This version changed for publication