I have often dealt with sensitive information where I work, and it is difficult to control access or distribution of printed material.
It would be good if you had relatively cheap paper that was sensitive to light after the initial copy.
This would mean you could print to it first time then it could not be copied thereafter.
Might be something like a magnetic/light sensitive paper like a Write Once CD or DVD.
I tried to look at what was available on the net and I could not find anything except Art type light sensitive paper, but this cannot be wriiten to initially anyway by a photcopier.
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Kind of ironic. This list is called: Why Not Open Source Movement
To try to create something that prevents others from seeing something, or prevent the "openess" of your brilliance. What is so secret? I'm for transparent information.
Kind of ironic, yes, but there is still sensitive information...
Albert, if everything is to be "open source", would you please let us know your annual salary, social security number, and credit card numbers, and where you live? I would highly appreciate your contribution to the open source movement! :-)
Or, on a non-personal note, we could publish the detailed instructions on how to make a suitcase nuclear dirty weapon and where to procure material....I'm sure no one would abuse that, such as terrorists.
Personally, I believe in shredders and some appropriate security to keep some information flow in the proper hands.
You could also work with the ink. I thought some colors (blue?) don't photocopy, at least on regular machines.
medium-blue ink on lighter blue paper would be difficult to photocopy.
Actually, I think something like that exists. I know of papers that will emblazon "Copy" or "Not Original" when copied (you can buy it on the internet). Your checks even have that technology.
So, I'm guessing instead of just a series of words, that the whole paper sheet could be treated like this and block out the paper.
Doesn't the government already have stuff like that?
This suggested thing already exist in real world!
Paper you can't photocopy
And you can combine it with these "copy secure" marker pens. Then the supposed secret message is shown on the original, but only the "WARNING UNAUTHORIZED COPY" appear on all copies.
Anyone who's been a teacher has likely seen exam forms with the answers in red. A mimeograph or photostatic copier doesn't see the red and ignores it.
As recent copiers are all digital scanners-cum-laser-printers, this doesn't work anymore, as the red prints as gray. An old exam form can be scanned and the red electronically removed, and recent exam forms probably come in electronic format in the first place, so the teacher can just print the "student version" for the exams.
The product sebastiannielson linked to does not prevent the info on the page from being copied, it merely puts a warning on it that it's not an original. The site says that there is no way to make a document uncopiable. My printer/scanner is full color and will copy any color ink quite faithfully, and it's a cheapy!