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Cheap Scanners Can "Fingerprint" Paper
carusoj writes "Researchers at Princeton University and University College London say they can identify unique information, essentially like a fingerprint, from any blank sheet of paper using any reasonably good scanner. The technique could be used to crack down on counterfeiting or even keep track of confidential documents. The researchers' paper on the finding is set to be presented at an IEEE security conference in Oakland, Calif., in May."
Update: 03/10 22:43 GMT by T : J. Alex Halderman, Associate Professor of Electrical Engineering and Computer Science at the University of Michigan and one of the authors of the study, writes with more: "My group has just put up a site about the work and a copy of the full paper, and we will probably add a video later tonight."
They could use this at Police Stations so that way they wouldn't have to use the fingerprint ink and such I would suppose.
Less cleanup, no paper towels to use to dry off your hands after you use soap and water to wash your hands. It would save some money in the long run....a very long run.
Friends help you move...
REAL Friends help you move dead bodies... ^_^
when the next "law and order" story will center on the yellow dots that laser printers leave or, now, this paper fingerprinting. The "bug" will love it.
Nullius in verba
Taping my fingertips...
First responder!
-Daver
Features that act like fingerprints.
Things like fiber arrangement, etc
Check out my sysadmin blog!
Professional counterfeiters won't be deterred by this. It'll only catch the teenagers that try to print twenty dollar bills to pay for their school lunches. Much like how Photoshop won't edit files with a certain shade of green, or how ink jet printers embed a unique identifier in the yellow ink output. *shrug* It's amusing that most counterfeit money comes from Iran from a pair of printing presses that are identical to the ones used here in the United States, yet there's all this effort on trying to curb production from Joe Average. Most real threats come from sophisticated operations like that, and require a team to combat. This is nothing more than a novelty.
#fuckbeta #iamslashdot #dicemustdie
Sorry, but this is only really useful in identifying leaks if the leaked document is either A) the original document or B) a high resolution/low contrast scan of the original document. Please note that documents are generally scanned at low resolution and high contrast to aid readability. The high contrast completely blows the background (i.e. the fingerprint) out.
Also, the minute a document is reproduced (fax, copier, laser printer, whatever), the fingerprint is destroyed.
"Two blank pieces of paper may look identical, but if you hold them to a light, you can see that in fact they're unique mashups of fibers."
In other news, the sun rose again this morning.
I can't believe you don't know what a Hasemalphaginnojinglanaporphomism is.
"A drug company like Pfizer, for example, could take fingerprints of their labels when they are shipped, and this data could be verified later by a government or company representative in order to spot fakes."
In times people consciously order fake viagra or fake diet pills this might not help.
This won't stop money counterfeiters from creating money. Even if you added some kind of barcode that contained the fingerprint of the paper to every bill, the overhead to scan the bill would make it worthwhile only to large bills, so the counterfeiters stick to small bills. Or they reverse the fingerprint process and print valid barcodes on the bills they counterfeit.
But in terms of tracking objects, it's a great idea. If a document winds up in the wrong hands and the authorities recover it, they could then trace it back to its origins. Take it a step further and apply the concept to other objects. Maybe use xrays on components of a car to help ID stolen parts. Cost of implementation would make this work only with very high-end autos. Maybe something similar for weapons? Serial numbers can be filed down, but changing the unique composition of the metal would require a bit more work.
The best thing is it works with existing items, so you don't have to force people to buy new items for the system to work.
HP released a palm-held page scanner that you would wipe across the paper like a squeegee. It would scan the text and assemble the entire page based upon the unique grain pattern in the paper. The market didn't understand the concept, wasn't ready for a briefcase document scanner, whatever the case was, but it failed and was withdrawn from market.
Good security is based upon reality and common sense. Common sense is a function of having common knowledge.
Fingerprints printed on paper can be used to fool high end Fingerprints scanners as well the mythbusters did that.
-Beastmom
The researchers' paper on the finding is set to be presented at an IEEE security conference in Oakland, Calif., in May.
After a high resolution scan, it turns out this is not the researchers' paper after all.
Beyond counterfeiting, there are uses of this technology in criminal investigations.
Say, someone sent a threatening letter to someone and then eventually murdered them.
Later, the murderer denies having written that letter.
The paper on which the threatening letter was written could be tied to the paper in the murderer's home using this kind of fingerprinting.
Of course, the courts in general have to be convinced of the uniqueness of this fingerprint before this could be used.
This is not news, the university of applied sciences in Mannheim worked on this several years ago, and it is already implemented in their diplomas.
Interestingly they discovered it as a side effect, while trying to cramp more data on a sheet of paper.
This is the german page where you can test a diploma: https://zeugnis.hs-mannheim.de/
I'm currently developing a Java fingerprinting library ( http://sourceforge.net/projects/jfooid/ ) and it's learned me if you want to fingerprint something, it needs a certain unique continuity. Fingerprints have that in their unique curves. Audio has it in the sound wave but I don't see how a piece of paper has that, let alone be able to distinguish a copy from an original.
The more I think about this less than astonishing breakthrough, the less sense it makes to me. It seems to me that, as described, the technique is useful only in proving that a piece of paper is identical to itself. Unless you're fascinated by tautologies, this is not exactly exciting; furthermore, none of the uses cited in the article seem plausible.
For example, how could this technique be used to detect counterfeit currency? As everyone who has ever thought of combining a 20 dollar bill and a Xerox machine knows, just copying the bill doesn't produce a convincing fake, because the mint uses special paper to print currency. Is the author of this article suggesting that we scan every bill that's printed, file the scans by serial number, then scan every bill that's spent, and compare the scan against the database? Even comparing only suspect bills seems impractical to me—besides, if the counterfeit is that good, not even the government wants to know.
The pharmaceutical label verification is equally ludicrous. Remember, you'd have to authenticate each particular label against the database to verify it. This is nuts. You don't just rely on the label to authenticate lab-grade products—you rely on procedures that include traces, accountability, and a documented chain of custody. If we're talking aspirin, then the cost would be ludicrously out of proportion to the gain. If we're really worried, say if we're dealing with plutonium or something, then we're not going to rely on a silly label for authentication. How do we know the label isn't real, and the stuff in the container was stolen in transit, and something else substituted?
Could we imagine a case where it would make sense to use this scanning method to verify the authenticity of a document? Say we have a very, very, important document. We want to make sure it doesn't get swapped out for a fake document that looks just like it? Aside from the question of why it would matter, I'd have to ask: which is more vulnerable to malicious tampering—a paper document or a database record?
There might be applications to this technology, but if so, the article isn't telling us.
Great men are almost always bad men--Lord Acton's Corollary
I don't see how it helps crack down on forgery at all. It only enables you to identify a piece of paper you have previously had access to in order to scan its fibres. Then, if you encounter the same physical piece of paper again, you can repeat the scan (which takes several passes using the otherwise conventional over-the-counter scanner).
It DOES enable you to identify a leaked document, if it comes back into your hands, but I don't see why you'd opt for paper fibre scanning over some other sort of hidden watermark technology, or even (gasp) printing a unique id on the document.
Anyone wanting to circumvent this technology could do so with a photocopier and a cigarette lighter.
The article does not clarify how exact they are. For example, there is a huge difference between only being able to identify that page A is still the original page A and being able to say that unknown page A came from Batch 12043, which according to our records was produced by X corporation, on Y Date, and sold to Z retailer on date W, using UPC code 90827452345 through 90827452356 Which they can do can dramatically alter the usefulness of the technology. I would be very surprised if they could do both.
excitingthingstodo.blogspot.com
So, it will work fine... until somebody spills some coffee on the paper or something. Big deal.
(Arrg, Slashdot seems to have eaten my first attempt at this comment)
A decent silicone mold of a sheet of paper would be able to pick up a sufficient level of detail as to reproduce something (like a resin cast) that could fool the scanner. A bit of experimentation could produce a substance with the physical properties of paper that could fool it...I'm thinking along the lines of a finer grained pulp with some stronger binding agents.
It would take some cleverness and home-brew spirit to work out the technique, but resolving it, and publishing it to the webz would allow counterfeiting to resume, granted with added costs.
If you do something illegal, use a stolen scanner and destroy it afterwards.
---- Booth was a patriot ----
Of course the professionals will continue to print. The reason they make it hard to counterfeit is to stop the casual guy in his basement and making a mess of the money supply.
You can never stop the hardcore well financed criminals.
---- Booth was a patriot ----
Only in England... Damn you big brother!!1
The reviewers didn't do their homework; this technique has been around for decades.
... see this paper by Sharma, Subramanian and Brewer from the 2008 ACM SIGCOMM Workshop on Networked Systems for Developing Regions (NSDR):
http://cs.nyu.edu/%7Elakshmi/s2p2.pdf