[3236] in cryptography@c2.net mail archive

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Time Based Token?

daemon@ATHENA.MIT.EDU (tzeruch@ceddec.com)
Tue Aug 25 11:56:51 1998

Date: Mon, 24 Aug 1998 21:11:44 -0400
From: tzeruch@ceddec.com
To: cryptography@c2.net
In-Reply-To: <199807180011.RAA02044@toad.com>

Now that I am playing with my palm III, something came up that made me
think of that token which displays a different number every 30 seconds.

Would something that would do a SHA1 of about 1K of random data (as a
shared secret), and the current time be secure?  Or would it have to be
more elaborate?



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