Re: Alternatives to a single bar code

From: Arthur Keller <arthur_at_kellers_dot_org>
Date: Wed May 05 2004 - 11:27:10 CDT

At 3:04 AM -0700 5/5/04, Steve Chessin wrote:
> >From karl@cavebear.com Wed May 5 02:22:48 2004
>>Delivered-To: voting-project@afterburner.sonic.net
>>Date: Wed, 5 May 2004 02:22:35 -0700 (PDT)
>>To: voting-project@lists.sonic.net
>>Subject: Re: [voting-project] Alternatives to a single bar code
>>
>>On Wed, 5 May 2004, Steve Chessin wrote:
>>
>>> The nice thing about multiple bar codes is that they scale.
>>
>>I'm concerned that the presence of multiple bar codes could lead to reader
>>misreads.
>
>I don't understand. How would the presence of multiple bar codes lead
>to reader misreads?
>
>>But more importantly, I'm concerned about attacks that could occur should
>>individual bar-codes from different ballots be scanned as if they were
>>from the same ballot.
>
>This seems to assume that ballot counting is done by using a hand-held
>scanner. This attack is not possible with a flat-bed scanner that
>scans the entire ballot at once. (Well, it is possible, if you take a
>pair of scissors and cut and paste the old fashioned way, but I assume
>that the other people in the polling place observing you count the
>ballots will stop you from doing this.)
>
>If the bar codes are used for tabulation as well as audio output (and I
>don't recommend this), you could also include with each bar-code the
>ballot number. Remember, I'm recommending OCR printing and flat-bed
>scanning for tabulation.

Use of an OCR font for the text is a good addition to the mix.
Full-page flat bed scanning requires that the ballot be removed from
the privacy folder for BVA (barcode vocalization app.), which is a
privacy risk for visually impaired voters.

Best regards,
Arthur

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Arthur M. Keller, Ph.D., 3881 Corina Way, Palo Alto, CA  94303-4507
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Received on Mon May 31 23:17:15 2004

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