[43340] in Cypherpunks
Re: Timed-release crypto - Proactive security plug
daemon@ATHENA.MIT.EDU (Beavis B. Thoopit)
Mon Nov 13 16:04:15 1995
From: "Beavis B. Thoopit" <beavis@bioanalytical.com>
To: amir@watson.ibm.com (Amir Herzberg)
Date: Mon, 13 Nov 1995 15:53:14 -0500 (EST)
Cc: cypherpunks@toad.com
In-Reply-To: <9511131904.AA21605@gimili.watson.ibm.com> from "Amir Herzberg" at Nov 13, 95 02:03:59 pm
[...]
> A solution to this is proactive secret sharing, as described in [HJKY95].
> In this protocol, the secret shares are periodically refreshed (i.e. new
> shares are computed distributively and then the old shares are erased).
> In this manner, an attacker has to break into most servers during the same
> period; shares from one period are worthless on the next period.
>
> Best, Amir
>
> [HJKY95] `Proactive Secret Sharing', A. Herzberg, H. Krawczyk, S. Jareski,
> M. Yung, Crypto 95.
[...]
Here is an example of _dynamics_ being used to increase the security of
a logical protocol. I believe that dynamics may be usable at a more micro
level to build a physical device that is expensive to compromise...
