[14323] in cryptography@c2.net mail archive
Re: quantum hype
daemon@ATHENA.MIT.EDU (Dave Howe)
Sun Sep 28 20:38:45 2003
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X-Original-To: cryptography@metzdowd.com
From: "Dave Howe" <DaveHowe@gmx.co.uk>
To: "Email List: Cryptography" <cryptography@metzdowd.com>
Date: Sun, 28 Sep 2003 17:41:33 +0100
Peter Fairbrother wrote:
> I promised some links about the 5/6 cloning figure. You've had a few
> experimental ones, here are some theory ones.
has anyone with better number theory / probability skills than me taken a
stab at exactly *how* accurate cloning would have to be (and how many
clones you would need) to determine accurately both the bit and filter
values for a quantum key exchange photon? for a single pass (5/6 photons
output) it feels like the odds are stacked against getting a clean
reading; for two passes (25/36) it feels even worse.
how accurate would cloning need to be to get a better than 1/3 failure
rate?
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