On Tue, 19 Sep 2006, Mark Goodge wrote:

On Tue, 19 Sep 2006 17:41:41 +0100, Grunff put finger to keyboard and
typed:

Brian Morrison wrote:

To endure that printing the stamp is done from within the Java sandbox
so that only one print attempt per bar-code can be made.

Well, yes, but if they display it full size, you can always screen-grab it.

You could also print to a virtual printer (or Postscript/PDF creator)
and then reprint the captured file later.

It's impossible to make it impossible to print something more than
once. You can make it difficult, but if you rely on it being difficult
as a method of validation then all you do is encourage people to
explore ways of defeating it.

....or for the non-technical user possibly require a number of extra steps
that means they get bored/scared/out of their depth and don't use the
system.

Tim
--
When playing rugby, its not the winning that counts, but the taking apart
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