event.value = identity.name + ” at ” + util.printd(“h:MM tt, mmm dd, yyyy”,new Date());
When the stamp gets placed on a document, the field gets filled with the username and time. When when someone copy an already placed stamp, and pastes it into another document, it will have the info from that first placed stamp, and its not fresh generated when pasted in a new document. So to make it fraude proof, im looking for some way to make the code run again also when the stamp is placed again through copy-pasting.
No, it's not possible to do that. If you want to reliably identify the person who applied it then you should use a digital signature, not a stamp.
Digital signature and/or the certificates ? As it are 2 different functions.
Looking into it, i think the certificates would be the most fraude secure. But here im doubting if we should work with self signed that always give warnings because the receiver doesn't have that certificate, or work with some web service, but im expecting that to be a more expensive alternative.
For validation you must give the receiver the public key of your certificate.