[Thinkfinger-devel] Capabilities/Enhancements? Multi-verify

[Thomas Harning Jr.]

Is there any way to try to match against multiple fingerprints w/o
re-swiping? I'm pretty sure the hardware's capable, since the
software that comes w/ the readers support multiple fingers...

Is there any documentation on the data sequences put together... or is
the only docs in the source code...

If its not done already.. here's potential use cases for multi-finger approach:
* Can enroll multiple fingerprints to make sure that you aren't
locked out due to unforseen circumstances.
* Can multi-match... login w/ JUST a fingerprint and no username by
attempting to match against a list of prints for the system.

[Timo Hoenig]

Post by Thomas Harning Jr.
Is there any way to try to match against multiple fingerprints w/o
re-swiping? I'm pretty sure the hardware's capable, since the
software that comes w/ the readers support multiple fingers...

On Windows, yes. The Linux binary driver does not allow that AFAIK
(I've never used it, so please someone speak up if I talk rubbish ;-).

Post by Thomas Harning Jr.
Is there any documentation on the data sequences put together... or is
the only docs in the source code...

That's all we got. There are is no documentation.

It would probably be nice to sniff under Windows and try to draw a
picture out of that to enhance ThinkFinger...

Post by Thomas Harning Jr.
* Can enroll multiple fingerprints to make sure that you aren't
locked out due to unforseen circumstances.
* Can multi-match... login w/ JUST a fingerprint and no username by
attempting to match against a list of prints for the system.

Yes, that's definitely what we're longing for. It's just dumb to first
type the user name followed by a swipe.

Thanks,

Timo

[Dietz Proepper]

Post by Thomas Harning Jr.
Is there any way to try to match against multiple fingerprints w/o
re-swiping? I'm pretty sure the hardware's capable, since the
software that comes w/ the readers support multiple fingers...

I'd be interested in getting the scaned bitmap from the reader and do the
matching stuff on my own...

Post by Thomas Harning Jr.
Is there any documentation on the data sequences put together... or is
the only docs in the source code...

The latter.

regards
Dietz

[Timo Hoenig]

Post by Dietz Proepper
I'd be interested in getting the scaned bitmap from the reader and do the
matching stuff on my own...

The AuthenTec does this. It's basically a scanner and there are already
SANE drivers to get the scanned image out of it.

The UPEK device has also the possibility to deliver image data (it's
only available on Windows with the binary driver, not with the Linux
binary driver). However, I'm not sure whether this is a high resolution
image which is sufficient to use in combination with a software
authentication algorithm. It's probably just a thumbnailed image of
your thumb ;-)

Thanks,

Timo

[Dietz Proepper]

Post by Timo Hoenig

Post by Dietz Proepper
I'd be interested in getting the scaned bitmap from the reader and do
the matching stuff on my own...

The AuthenTec does this. It's basically a scanner and there are already
SANE drivers to get the scanned image out of it.

Ack.

Post by Timo Hoenig
The UPEK device has also the possibility to deliver image data (it's
only available on Windows with the binary driver, not with the Linux
binary driver). However, I'm not sure whether this is a high resolution
image which is sufficient to use in combination with a software
authentication algorithm. It's probably just a thumbnailed image of
your thumb ;-)

;-) The specs of the scanner would be really, really nice.

[Gabor Janak]

Wow, last weekened, i tried the same, and searched for Information.
I'm interested in any Information of the Protocol, too.

Who has Reverese Engeneneered it ?

I think togehter with Snoppy (usb sniffer app for windows), we can get the
Information. (for example, save 20 Fingerprints in Memory of the Reader).

Upek/STG wrote, that only her Linux Driver does not support 1:n matching.


Would be great if libthinkfinger support all Features.

PS: Isn't it good to split libthinkfinger and pam_thinkfinger in two
Projects ? I'm testing the ebuilds for gentoo currently.

Post by Thomas Harning Jr.
Is there any way to try to match against multiple fingerprints w/o
re-swiping? I'm pretty sure the hardware's capable, since the
software that comes w/ the readers support multiple fingers...
Is there any documentation on the data sequences put together... or is
the only docs in the source code...
* Can enroll multiple fingerprints to make sure that you aren't
locked out due to unforseen circumstances.
* Can multi-match... login w/ JUST a fingerprint and no username by
attempting to match against a list of prints for the system.

[Timo Hoenig]

Hi Gabor,

Post by Gabor Janak
I think togehter with Snoppy (usb sniffer app for windows), we can get the
Information. (for example, save 20 Fingerprints in Memory of the Reader).

Are you sure that they are stored in the fingerprint reader? I have not
yet investigated but assumed that they are stored within the TPM. But
while thinking about it would make sense that they are stored on the
fingerprint reader. After all it is being used to unlock the TPM, too.

Post by Gabor Janak
Upek/STG wrote, that only her Linux Driver does not support 1:n matching.

Yes. That's why reversing the Linux driver does not help more than
where we are at currently. If someone is familiar in helping out
(analyzing snoop logs) I'd be glad.

Post by Gabor Janak
Would be great if libthinkfinger support all Features.

Agreed.

Post by Gabor Janak
PS: Isn't it good to split libthinkfinger and pam_thinkfinger in two
Projects ? I'm testing the ebuilds for gentoo currently.

Why would you want to split them?

Thanks,

Timo