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Article #871

Re: User authentication

#871
From: Carl Ellison
Date: Wed, 02 Sep 1992 19:11
37 lines
2038 bytes
In article <1992Sep1.194045.1943@bcars64a.bnr.ca> schow@bqneh23.bnr.ca (Stanley T.H. Chow) writes:
>>And, as I said, once you have a public key account, I don't care what
>>pronounceable name you use.  I (the bank) will ignore it.  The only thing
>>which matters is the public key.
>
>--------------------
>
>Lost Key alert:
>
>It has come to our attention that our private key has been
>lost. Please stop using the old public key at once and use this
>new key instead "&*(413nmlfs09uln1143".
>
>CEO of IBM
>
>----------------------
> 
>Can I now transfer some money?

Not from my bank, you can't.

This is one reason "How To Share a Secret" (Adi Shamir, CACM, Nov 79, p612)
was so important.  If you really lose your key, I guess I get to keep the
money.  :-)

Actually, being a user-friendly bank, I will certainly let you define
synonyms for your public key.  All you have to do is send the request,
listing both public keys, signed twice, once by each key.  I'll let you
list as many synonyms (aliases) as you want to bother listing -- to cover
for the case when a key is lost.  Being really friendly, I won't even
charge you for my having to store these relationship messages.  I'll lump
that in with the cost of doing business.

I'll also accept commands of the form: 'the private key for
"&*(413nmlfs09uln1143" has possibly been stolen -- stop honoring it.' --
but of course, that command has to be signed in one of the alias keys, in
order to prove it's not a forgery.
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Message-ID: <6114@transfer.stratus.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!darwin.sura.net!wupost!micro-heart-of-gold.mit.edu!bu.edu!transfer!ellisun.sw.stratus.com!cme
References: <1992Aug31.135512.16204@sniap.mchp.sni.de> <6069@transfer.stratus.com> <1992Sep1.194045.1943@bcars64a.bnr.ca>

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Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!darwin.sura.net!wupost!micro-heart-of-gold.mit.edu!bu.edu!transfer!ellisun.sw.stratus.com!cme
From: cme@ellisun.sw.stratus.com (Carl Ellison)
Newsgroups: sci.crypt
Subject: Re: User authentication
Message-ID: <6114@transfer.stratus.com>
Date: 2 Sep 92 19:11:25 GMT
References: <1992Aug31.135512.16204@sniap.mchp.sni.de> <6069@transfer.stratus.com> <1992Sep1.194045.1943@bcars64a.bnr.ca>
Sender: usenet@transfer.stratus.com
Organization: Stratus Computer, Software Engineering
Lines: 37