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99%
05-19-2005, 07:42 AM
How to fake fingerprints?

In order to fake a fingerprint, one needs an original first. Latent fingerprints are nothing but fat and sweat on touched items. Thus to retrieve someone elses fingerprint (in this case the fingerprint you want to forge) one should rely on well tested forensic research methods. Which is what's to be explained here. (Figure 1).

http://www.ccc.de/biometrie/images/tiny_01-fingerabdruck+mate.jpg
Figure 1: Fat residue from fingerprint (http://www.ccc.de/biometrie/images/small_01-fingerabdruck+mate.jpg?language=en)

A good source of originals for our counterfeits are glasses, doorknobs and glossy paper. The standard method of forensic research makes them visible: Sprinkling it with colored powder, which sticks to the fat (Figure 2).

http://www.ccc.de/biometrie/images/tiny_02-fingerabdruck+grafit.jpg
Figure 2: Visualisation with graphite powder (http://www.ccc.de/biometrie/images/small_02-fingerabdruck+grafit.jpg?language=en)

Another solution involves Cyanoacrylat, the main ingredient of superglue. A small amount thereof is poured into a bottlecap, which is then turned upside down and put over the fingerprint. (Figure 3).

http://www.ccc.de/biometrie/images/tiny_03-mate+deckel.png
Figure 3: Visualisation with superglue (http://www.ccc.de/biometrie/images/small_03-mate+deckel.png?language=en)

The Cyanoacrylat gasses out and reacts with the fat residue to a solid, white substance (Figure 4).

http://www.ccc.de/biometrie/images/tiny_04-finger+zyanoacrylat.png
Figure 4: Print after Cyanacrylate processing (http://www.ccc.de/biometrie/images/small_04-finger+zyanoacrylat.png?language=en)

The further treatment involves scanning/photographing (Figure 5) and a bit of graphical refurbishment (Figure 6).

http://www.ccc.de/biometrie/images/tiny_05-finger+cyanoacrylate+kamera.png
Figure 5: Digitalising the print (http://www.ccc.de/biometrie/images/small_05-finger+cyanoacrylate+kamera.png?language=en)

http://www.ccc.de/biometrie/images/tiny_06-finger+nachbearbeiten.png
Figure 6: Brushing up the image of the print (http://www.ccc.de/biometrie/images/small_06-finger+nachbearbeiten.png?language=en)

The goal is to get an exact image of the fingerprint, for further use as mold, out of which the dummy is made. The easiest way is to print the image on a transparency slide (the ones normally used for an overhead projector) with a laser printer. The toner forms a relief, which is later used similar to letter press printing. Wood glue is suitable for producing the dummy (Figure 7)

http://www.ccc.de/biometrie/images/tiny_07-finger+holzleim.png
Figure 7: Wood glue for the dummy (http://www.ccc.de/biometrie/images/small_07-finger+holzleim.png?language=en)

A small dash of glycerene may be used to optimize humidity and workability. After thorough mixing, the dummy gets coated with a thin layer of the compound (Figure 8,9).

http://www.ccc.de/biometrie/images/tiny_08-attrappe03.jpg
Figure 8: Covering the dummy with wood glue (http://www.ccc.de/biometrie/images/small_08-attrappe03.jpg?language=en)

http://www.ccc.de/biometrie/images/tiny_09-attrappe04.jpg
Figure 9: Glue layer on the printout (http://www.ccc.de/biometrie/images/small_09-attrappe04.jpg?language=en)

99%
05-19-2005, 07:43 AM
After the glue has dried (Figure 10), it is pulled off the foil (Figure 11) and is cut to finger size.

http://www.ccc.de/biometrie/images/tiny_10-attrappe05.jpg
Figure 10: Hardened glue (http://www.ccc.de/biometrie/images/small_10-attrappe05.jpg?language=en)

http://www.ccc.de/biometrie/images/tiny_11-attrappe06.jpg
Figure 11: Dummy, ready to use (http://www.ccc.de/biometrie/images/small_11-attrappe06.jpg?language=en)

Theatrical glue is used to glue the dummy onto the own finger (Figure 12).

http://www.ccc.de/biometrie/images/tiny_12-finger+attrappe.png
Figure 12: The new identity is ready! (http://www.ccc.de/biometrie/images/small_12-finger+attrappe.png?language=en)

The new identity is ready!

biometrie(at)ccc.de (biometrie%28at%29ccc.de?language=en)

enoughfakefiles
05-19-2005, 09:25 AM
Just use someone elses hands.:unsure:

lynx
05-19-2005, 10:58 AM
Another solution involves Cyanoacrylat, the main ingredient of superglue. A small amount thereof is poured into a bottlecap, which is then turned upside down and put over the fingerprint. Also known as "How to get a bottlecap stuck to your finger". :lol:

bujub22
05-19-2005, 12:34 PM
this is like B/E 101

DarthInsinuate
05-19-2005, 12:50 PM
can't you just wear gloves?

bujub22
05-19-2005, 01:06 PM
can't you just wear gloves?
ya but a true crimnal would go fo the gusto and change them permantly!
by jus using a acid base substance and burn the prints diffrent lil by lil
kinda like when u scar yourself that part of the skin does'nt grow back the same but with fingerprints they can thats y you either hav to hav them laser'd or burned ...gloves are good but they also can be shit cuz evidence is left in the glove ..sweat, tissue from your skin also if anyone found it.
best bet to me is earse your fingerprint by burning them diffrent ;)

manker
05-19-2005, 01:10 PM
ya but a true crimnal would go fo the gusto and change them permantly!
by jus using a acid base substance and burn the prints diffrent lil by lil
kinda like when u scar yourself that part of the skin does'nt grow back the same but with fingerprints they can thats y you either hav to hav them laser'd or burned ...gloves are good but they also can be shit cuz evidence is left in the glove ..sweat, tissue from your skin also if anyone found it.
best bet to me is earse your fingerprint by burning them diffrent ;)Maybe not robbing anywhere would also work :unsure:




Hi, Joob - Dave wanted me to ask about teh gepwear ;)

Gripper
05-19-2005, 02:13 PM
you could varnish your finger tips that might work,2pairs of surgical type gloves works,apparently they can still get a print through one?Too much watching of CSI :)

bujub22
05-19-2005, 02:32 PM
Maybe not robbing anywhere would also work :unsure:




Hi, Joob - Dave wanted me to ask about teh gepwear ;)
i aint drawn shit since life threw a curve ball at me :frusty:
but i swear to make some more when shits better ;)

manker
05-19-2005, 02:41 PM
i aint drawn shit since life threw a curve ball at me :frusty:
but i swear to make some more when shits better ;)Hope things get better for ya soon http://www.frodenkvist.com/forums/style_emoticons/default/thumbup.gif

Btw, new url for t'Moderation (http://moderation.invisionzone.com/index.php?act=idx).

bujub22
05-19-2005, 09:17 PM
Hope things get better for ya soon http://www.frodenkvist.com/forums/style_emoticons/default/thumbup.gif

Btw, new url for t'Moderation (http://moderation.invisionzone.com/index.php?act=idx).
http://www.frodenkvist.com/forums/style_emoticons/default/thumbup.gif