On Tue, 19 Sep 2006 17:51:52 +0100, Brian Morrison put finger to
keyboard and typed:

Bob Eager wrote:
On Tue, 19 Sep 2006 16:37:23 UTC, Brian Morrison
wrote:

What on earth would be the point?
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.

An over-complex and ultimately useless solution! One can always hold the
print job at the spooler, and ask it to print multiple times...so that
would not be secure at all.

That's why it has to be done with unique barcodes.

Except that they're not unique if they can be printed multiple times.

The barcode is unique to the purchase. Once scanned on its way through
the postal system, it will generate an error if scanned in again and
hence prevent re-use of the same code.

Mark
--
Please help a cat in need: http://www.goodge.co.uk/cat/