[49284] in cryptography@c2.net mail archive
Re: Circle Bank plays with two-factor authentication
daemon@ATHENA.MIT.EDU (leichter_jerrold@emc.com)
Tue Oct 3 17:06:14 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
From: leichter_jerrold@emc.com
Date: Tue, 3 Oct 2006 10:18:35 -0400
In-Reply-To: <6.2.0.14.0.20060929214404.02f11bd8@mail.stiennon.com>
To: <richard@stiennon.com>
Cc: <edgerck@nma.com>, <cryptography@metzdowd.com>
| Have you seen the technique used at http://www.griddatasecurity.com ? =
Sounds
| a lot like your original idea.
Nah - more clever than what I had (which was meant for an age when you
couldn't carry any computation with you, and things you interacted with
on a day by day basis didn't have displays).
GridCode's idea is quite clever, but the fact that it's ultimately a
simple substitution - a varying simple substitution, but of a fixed
value - seems dangerous. No obvious (to me!) attacks, though....
-- Jerry
---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo@metzdowd.com
