Re: Dynamic password authentication scheme

From: Erich Buri (
Date: 01/27/04

  • Next message: Erich Buri: "Re: XMAS Scanning"
    Date: Tue, 27 Jan 2004 00:40:31 +0100
    To: amandeep Singh <>

    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

    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.

    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.


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