Re: OVC-discuss Digest, Vol 26, Issue 20

From: Jerry Lobdill <lobdillj_at_charter_dot_net>
Date: Fri Dec 08 2006 - 14:53:19 CST

Thanks, Charlie. I agree with you. I think this issue is really a
non-issue from a practical point of view. Even if it does eventually
become somehow feasible from a resolution point of view I think the
requirement for a UV bulb in the scanner makes this impractical.

Can we put this to rest now?

Jerry Lobdill

At 02:00 PM 12/8/2006, you wrote:
>Reply-To: charlie strauss <>,
> Open Voting Consortium discussion list
> <>
>Content-Type: text/plain; charset="UTF-8"
>Subject: Re: [OVC-discuss] latent fingerprints
>Message: 2
>First I think this worrying about fingerprints issue is edging
>towards the realm of fume huffing. If I wanted to know which
>ballot was yours , I could figure out ways a lot simpler than finger
>print analysis. e.g. just give them a bag of polonium porkrinds
>before they go in the polls. On the less fantastic side, I've got
>bags of microtag poweder sitting in my desk drawer (it's used to
>tracably serial number mark everthing from gunpowder to designier
>jeans: it looks and acts like fine soot till you put it under a
>microscope--then you see a colored plastic bar code). it would be
>easy to get this onto someones hands. Or, even more
>realistically, i'd just edge mark the ballots ahead of time: draw
>a fine diagonal line across the edges with a magic marker--then I
>could always recreate the ballot order later.
>However taking it as a challenge to somehow scan fingerprints....
>First the kind of blunt instruments in use for oval scanners wont
>have the resolution. But since some folks want to replace those
>with high resolution scanners, then one approach might be to use a
>UV fluorescent light in the scanner. Finger prints exhibit some
>weak phosphorescence. Unfortunately most white paper also contains
>"whiteners" that are fluorescent as well so there's going to be a
>signal to noise issue. You might be able to boost that some if you
>had a way to pulse the illumination and time-gate the optical
>signal. But that would be one heck of piece of scanner
>hardware. If you selected the whitener carefully you might be abled
>to have it quenched by the finger print oil itself.... Or better
>yet, don't order ballots that are naturally fluorescent.
>perhaps a better approach would be to give the person a slighty
>leaky pen and assume they would get it on their fingers.

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Received on Sun Dec 31 23:17:09 2006

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