RE: Dynamic password authentication scheme

["David Gillett" <gillettdavid () fhda edu>]

  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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