> How about an EXTREEMLY secure solution. A secure path (perhaps the 'net,
> using PGP) is used to transmit a 100KB compressed file full of lets say
> 200,000 keys.
>
> When the client logs into the system, the next key is asked for, and if
> given correctly, access will be allowed. That key is then deleted from the
> file, and the next is used on the next login.
>
> Cumbersome, but secure.
>
and prone to error, omission, corruption etc. Virtually all automatic
systems like this either break down with monotonous regularity or are not
as secure as you think and get compromised.
Dirk
-- Dirk-Jan Koopman Tel/Fax: +44 1362 696076 Mobile: +44 973 333806 Computer Consultant Email: xsbxov.rwqasjzbe@lunar-linux.org or G1TLH@GB7TLH.#35.GBR.EU "The typewriting machine, when played with expression, is no more annoying than the piano when played by a sister or near relation." --Oscar Wilde