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authorfrank <frank@ccc.de>2013-09-24 17:30:27 +0000
committerfrank <frank@ccc.de>2020-05-23 13:39:31 +0000
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@@ -1,6 +1,6 @@
1title: Chaos Computer Club breaks Apple TouchID 1title: Chaos Computer Club breaks Apple TouchID
2date: 2013-09-21 22:04:00 2date: 2013-09-21 22:04:00
3updated: 2013-09-24 17:14:29 3updated: 2013-09-24 17:30:27
4author: frank 4author: frank
5tags: update, pressemitteilung, biometrie, biometrics, apple, touchid, fingerprint 5tags: update, pressemitteilung, biometrie, biometrics, apple, touchid, fingerprint
6 6
@@ -43,6 +43,25 @@ bit moist and then placed onto the sensor to unlock the phone. This
43process has been used with minor refinements and variations against the 43process has been used with minor refinements and variations against the
44vast majority of fingerprint sensors on the market. 44vast majority of fingerprint sensors on the market.
45 45
46**Update:**
47
48The process described above proved to be somewhat unreliable as the
49depth of the ridges created by the toner was a little too shallow.
50Therefore an alternative process based on the same principle was
51utilized and has been demonstrated in an extended video available
52[here](http://www.heise.de/video/artikel/The-iPhone-5s-Touch-ID-hack-in-detail-1966044.html "Refined TouchID hacking process"). First,
53the residual fingerprint from the phone is either photographed or
54scanned with a flatbed scanner at 2400 dpi. Then the image is converted
55to black & white, inverted and mirrored. This image is then printed onto
56transparent sheet at 1200 dpi. To create the mold, the mask is then used
57to expose the fingerprint structure on photo-senistive PCB material. The
58PCB material is then developed, etched and cleaned. After this process,
59the mold is ready. A thin coat of graphite spray is applied to ensure an
60improved capacitive response. This also makes it easier to remove the
61fake fingerprint. Finally a thin film of white wood glue is smeared into
62the mold. After the glue cures the new fake fingerprint is ready for
63use.
64
46\ 65\
47"We hope that this finally puts to rest the illusions people have about 66"We hope that this finally puts to rest the illusions people have about
48fingerprint biometrics. It is plain stupid to use something that you 67fingerprint biometrics. It is plain stupid to use something that you