Harald Welte wrote:
On Thu, Feb 01, 2007 at 01:45:55PM -0500, Heilpern, Mark wrote:
In any case, to get back to the Neo1973, or even future phones: I don't
think that there are many sensors that fulfill the following criteria
1) full hardware docs (may be under NDA, but allowing GPL software
development)
2) small enough for a mobile device
3) cheap enough
4) not easy to fool
You can probably have two or maybe three conditions fulfilled, but not
all of them.
There are not-bad options - with something like a 4*256 pixel imager.
Cheap, pretty small, docs - as it's just a camera, easy to fool... Well,
it's a fingerprint sensor.
There are interesting possibilities to add security to fingerprint sensors.
For example, which finger?
If three fingers of one hand have to be scanned in a particular order,
or it requires a password afterwards.
Or use it as a little optical mouse backwards, and have a 'signature'.
It can even be used as a substitute for a thumbstick in the normal UI.
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