License / Registration key enabled software

[Sybren Stuvel]

Mike Playle enlightened us with:
> Imagine you're an IT manager for a medium-to-large company who wants
> to use some expensive piece of software. You talk to the vendor and
> buy a licence to use the software on up to 5 machines at once, but
> you don't know who in the company will want to use it, so for
> convenience you want to install it on every PC in the building.
>
> Having installed it all over the shop, how can you be sure that only
> 5 people are using it at any one time?

Write the software in such a way that it needs a certificate on a
smartcard, then supply the company with five smartcards.

Sybren
-- 
Sybren Stüvel
Stüvel IT - http://www.stuvel.eu/