[20330] in cryptography@c2.net mail archive
Re: "Study shows how photonic decoys can foil hackers"
daemon@ATHENA.MIT.EDU (Andrea Pasquinucci)
Wed Mar 8 12:10:37 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Thu, 2 Mar 2006 10:08:12 +0100
From: Andrea Pasquinucci <cesare@ucci.it>
To: cryptography@metzdowd.com
Cc: leichter_jerrold@emc.com
Reply-To: Andrea Pasquinucci <cesare@ucci.it>
Mail-Followup-To: Andrea Pasquinucci <cesare@ucci.it>,
cryptography@metzdowd.com, leichter_jerrold@emc.com
In-Reply-To: <Pine.SOL.4.61.0603011137090.13243@mental>
Yes I do. It is a technique proposed in 2002 by W.-Y. Hwang which allows
to increase the performances of Quantum Key Distribution systems. The
paper which this press release refers to, is
http://lanl.arxiv.org/abs/quant-ph/0503192
The abstract of the paper is:
To increase dramatically the distance and the secure key generation rate
of quantum key distribution (QKD), the idea of quantum decoys--signals
of different intensities--has recently been proposed. Here, we present
the first experimental implementation of decoy state QKD. By making
simple modifications to a commercial quantum key distribution system, we
show that a secure key generation rate of 165bit/s, which is 1/4 of the
theoretical limit, can be obtained over 15km of a Telecom fiber. We also
show that with the same experimental parameters, not even a single bit
of secure key can be extracted with a non-decoy-state protocol. Compared
to building single photon sources, decoy state QKD is a much simpler
method for increasing the distance and key generation rate of
unconditionally secure QKD.
Andrea
PS. Happy to answer more questions off-list
On Wed, Mar 01, 2006 at 11:38:54AM -0500, leichter_jerrold@emc.com wrote:
* Does anyone have an idea of what this is about? (From Computerworld):
*
* -- Jerry
*
* FEBRUARY 23, 2006 (NETWORK WORLD) - A University of Toronto professor
* and researcher has demonstrated for the first time a new technique for
* safeguarding data transmitted over fiber-optic networks using quantum
* cryptography.
[...]
--
Andrea Pasquinucci cesare@ucci.it
PGP key: http://www.ucci.it/ucci_pub_key.asc
fingerprint = 569B 37F6 45A4 1A17 E06F CCBB CB51 2983 6494 0DA2
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