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1998-09-21 - Re: ArcotSign (was Re: Does security depend on hardware?)

Header Data

From: Bruce Schneier <schneier@counterpane.com>
To: Mok-Kong Shen <mok-kong.shen@stud.uni-muenchen.de>
Message Hash: a46a6b0eba754143e67c955033437cd2ea2e955c8caa69f1ce6e6804c9841c35
Message ID: <199809221128.GAA19882@mixer.visi.com>
Reply To: <Pine.LNX.3.96.980921133001.20069A-100000@blackbox>
UTC Datetime: 1998-09-21 22:26:50 UTC
Raw Date: Tue, 22 Sep 1998 06:26:50 +0800

Raw message

From: Bruce Schneier <schneier@counterpane.com>
Date: Tue, 22 Sep 1998 06:26:50 +0800
To: Mok-Kong Shen <mok-kong.shen@stud.uni-muenchen.de>
Subject: Re: ArcotSign (was Re: Does security depend on hardware?)
In-Reply-To: <Pine.LNX.3.96.980921133001.20069A-100000@blackbox>
Message-ID: <199809221128.GAA19882@mixer.visi.com>
MIME-Version: 1.0
Content-Type: text/plain



At 12:48 PM 9/22/98 +0100, Mok-Kong Shen wrote:
>Bruce Schneier wrote:
>> 
>> At 08:59 AM 9/22/98 +0100, Mok-Kong Shen wrote:
>
>> >A question : How does the legitimate user find his password?
>> >(Sorry for not having followed this thread from the beginning.)
>> 
>> He uses a remembered secret and some mathematical magic.
>
>Another naive question: Why is the remembered secret not sufficient
>(thus doing away with the magic)?

One of the significant improvements is that the scheme is immune to
offline password guessing attacks.

Bruce
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