RE: Dynamic password authentication scheme
From: David Gillett (gillettdavid_at_fhda.edu)
Date: 01/28/04
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To: "'amandeep Singh'" <amandeep1@hotpop.com> Date: Tue, 27 Jan 2004 16:20:44 -0800
Believe it or not, I think most of this ground has been covered
over a decade ago. SecurID resolves most of the problems, and is
well established in the marketplace.
David Gillett
> -----Original Message-----
> From: Erich Buri [mailto:buri@z17.net]
> Sent: January 26, 2004 15:41
> To: amandeep Singh
> Cc: security-basics@securityfocus.com
> Subject: Re: Dynamic password authentication scheme
>
>
>
> I agree that it would be great to have somthing like dynamic
> passwords.
>
> but i think that your solution does not change much.
>
> > in which the password is not stored in the hard disk or
> any auxiliary
> > memory and gets changed every time a user is going to be
> > authenticated.
>
> but isn't there this values computed from the random input that gets
> stored on the server? This is much like the password. Because
> if i know
> this value and the time I wan't to do the login, i can calculate the
> password!
>
> Same thing if i steal the secret value from the customer
> (sniffing/reading on the disk, since he may store it
> there.../keyloggin
> the value when it is typed into the algorithem to compute the
> one-time-password. since this function must be one-way and is
> thus very
> likely complicated).
>
>
> Did i miss the point?
>
> Apart from that there exists already a solution called SecureID.
>
> http://www.hpcmo.hpc.mil/Htdocs/SECURITY/securid_q.html
>
> which does basicly the same thing except that in this case the secret
> value is stored inside the card and the one-time-password is
> calculated
> directly by the card.
>
> Tell me if i'm wrong but i think your solution is basicly
> shifting the
> problem from cracking the password to stealing a number.
>
> gruss
> buri
>
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