[E-voting] Not random enough? (Was: CEV submission -- draft)

Aengus Lawlor aengusl at eircom.net
Mon Mar 15 12:43:26 GMT 2004


Adrian Colley <aecolley at spamcop.net> wrote:
> Subject: [E-voting] > To: Colm MacCarthaigh <colm at stdlib.net>
>
> A new thing is that I looked at the PTB's evaluation of the random
> placement of ballot records within the ballot module.  It _isn't_
> random enough.  If you know the preferences of voters #1 and #3, and
> they're unique, then you can deduce voter #2's preferences with 100%
> accuracy just from examining the order of ballot records on the
> ballot module.  It doesn't matter how many ballots are stored on the
> ballot module.  Apparently 80% of all ballots are unique.  I think
> this is a real honest-to-God showstopper for the ESI2.

Can you expand on that a bit, Adrian?

Aengus




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