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Date:      Wed, 22 Aug 2001 12:52:38 -0400 (EDT)
From:      Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To:        Dave Ryan <dave.ryan@eircom.net>
Cc:        freebsd-security@FreeBSD.ORG
Subject:   kerberosV - SecurID
Message-ID:  <200108221652.f7MGqco61050@khavrinen.lcs.mit.edu>
In-Reply-To: <20010822174157.A28071@alpha.eng.eircom.net>
References:  <3B83A8BC.BCF790A0@karolinelund.dk> <20010822140020.A1911@alpha.eng.eircom.net> <200108221628.f7MGSud60744@khavrinen.lcs.mit.edu> <20010822174157.A28071@alpha.eng.eircom.net>

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<<On Wed, 22 Aug 2001 17:41:57 +0100, Dave Ryan <dave.ryan@eircom.net> said:

> Does anyone know if RSA Securid OTP's are used anywhere to enhance the ticket
> granting phase of a kerberos authentication sequence?

Yes.  I believe one of the USDOE-funded National Labs is doing so.
The process is called ``preauthentication'' in Kerberos terminology.
A principal whose REQUIRES_PREAUTH flag is set in the KDC's database
must prove to the KDC's satisfaction that it is who it claims to be
before the KDC will issue a TGT.  (The principal still must have a
password which is used as the decryption key for the TGT.)

-GAWollman


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