Comments on: Breaking encryption the easy way

By: Antonio Calo'

Antonio Calo' — Mon, 09 Feb 2009 17:20:59 +0000

Have you the latest version of Grfinger.dll compatible with diglital persona 4000b

i have the same problem (Breaking encryption the easy way)

I have realized a software using grfinger.dll and the effect or problem is the same that figure

Please Contact or help me

Best regards
Antonio Calo’

By: -zer0-

-zer0- — Tue, 21 Oct 2008 01:07:57 +0000

i encountered a problem between the digital persona 4000 and 4000b, i developed program where i used the dp 4000 device. i was successfully finished this with grfinger driver (fingercap). the next thing, my company bought dp 4000b device i try to use this as a device to my program but it was not the same as dp 4000. the images output was jumbled or encrypted i think like dsd said.
the question is what can i do to make the output of dp 4000b the same as dp 4000? i can’t realy understand the way dsd did at his explanation. i hope u can give me the specific way to do it. thank for advance.

By: Galerio

Galerio — Thu, 13 Sep 2007 21:11:10 +0000

Well… is there any software that is not Digital Persona that we can use with our MS fingerprint reader? Any better software… Maybe freeware…
And after having changed the firmware (in the windows dll), can we use software like DigitalPersona PRO?

Thanks

By: joseph

joseph — Thu, 26 Oct 2006 06:42:56 +0000

Hi im implementing an fingerprint enhancement algorithm using partial derivates just as verifinger algorithm, the idea is to continue the fvs project and is my Ms final work, Im working in windows with the C++ builder, Im about to purchase the UrU4000 but digital persona’s peoples told me that to obtain an image i have also to purchase their damn SDK, do anyone knows how to interactuate with the Driver whit out purchasing their SDK ??? guido.pusiol@gmail.com
thnx

By: dsd’s weblog » Blog Archive » Fingerprinting

dsd’s weblog » Blog Archive » Fingerprinting — Wed, 30 Aug 2006 03:24:23 +0000

[...] dsd’s weblog friend of the night « Using git-bisect to find buggy kernel patches Breaking encryption the easy way » [...]

By: dsd’s weblog » Blog Archive » libdpfp 0.2.0 released

dsd’s weblog » Blog Archive » libdpfp 0.2.0 released — Wed, 16 Aug 2006 17:25:55 +0000

[...] Not requiring firmware avoids the potential distribution issues we had: we don’t have the rights to distribute their firmware. It is now not required because the device stores it, and even brand new devices seem to ship with the firmware already saved on the device. One reason we might need the firmware again is to disable encryption, but I’m reasonably confident we can do that without a firmware image — just waiting for someone who has a device which is encrypting images to come along so that I can test a theory. [...]

By: nathan

nathan — Wed, 17 May 2006 18:32:13 +0000

to change the firmware in windows…

if starting from scratch.
1 – unzip MS software. (DP_PM_xxxxx, avail from Microsoft).
2 – in *driver*, modify the *dpD0Bx01.dll* file (should be around 80kb) in a hex editor.
3 – modify bit at 0xE9B7 from a 0 to a 1. save it.
4- plug your MSFR in, and it should ask for drivers. point it to the stuff you unzipped/modified.

if you already have it installed.
1 – unplug your MSFP.
2 – goto windows/system32/
3 – modify the *dpD0Bx01.dll* file (should be around 80kb) in a hex editor.
4 – modify bit at 0xE9B7 from a 0 to a 1. save it.
5 – plug the MSFP back it.

NOTE: Once you flip that one bit, the MS software will NOT work anymore. You can use GrFinger to verify that the image from the fingerprint ready is now encrypted. (before – fingerprint is visible; after – fingerprint is “noise”)

By: Adzni

Adzni — Thu, 20 Apr 2006 10:26:49 +0000

May I know know if U are U 4000 can be converted to serial? is there such converter?
Actually, my project is to make U are U 4000 to be a stand alone sensor by adding Bluetooth feature in it. However, stand alone Bluetooth only support serial. your suggestions are highly appreciated

By: Adzni

Adzni — Thu, 20 Apr 2006 10:23:06 +0000

AMi know know if U are U 4000 can be converted to serial? is there such converter?

By: Godzilla41

Godzilla41 — Fri, 07 Apr 2006 22:30:08 +0000

Nice project
I am form thailand i sale finger print product and interest develop Finger in linux Now i have EDK of A5 Fingerprint product of http://www.zksoftware.com