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# RE: Multiple uploads don't verify checksums

- To: <support@gesn.com>
- Subject: RE: Multiple uploads don't verify checksums
- From: "Ken Clark" <ken@gesn.com>
- Date: Fri, 25 Feb 2000 14:10:18 -0600
- Importance: Normal
- In-reply-to: <005001bf7fcd$187f6a90$933f1d26@stevek.gesn.com>

    Its just a counters thing.  Reset election will clear any corrupt counters
    that were uploaded.

    Ken

    > -----Original Message-----
    > From: owner-bugtrack@gesn.com [mailto:owner-bugtrack@gesn.com]On Behalf
    > Of Steve Knecht
    > Sent: Friday, February 25, 2000 2:16 PM
    > To: bugtrack@gesn.com; support@gesn.com
    > Subject: Re: Multiple uploads don't verify checksums
    >
    >
    > Guy, Marin bypassed the data checksums on this without my knowledge
    > repeatedly into the database that we are using for the election. (The one
    > with Voter Reg totals input).  Will RESET ELECTION take away any corrupted
    > counters and therefore wipe out any of these situations described below??
    > Or do I need to backtrack to a db prior to the uploads and
    > reinput Voter Reg
    > totals (not a good alternative).
    > -----Original Message-----
    > From: Guy Lancaster <glanca@gesn.com>
    > To: Bugs <bugtrack@gesn.com>
    > Date: Thursday, February 24, 2000 10:27 AM
    > Subject: Multiple uploads don't verify checksums
    >
    >
    > >  When uploading multiple memory cards during the same
    > >connection, the Accu-Vote does not verify on successive
    > >memory cards that the checksums match the data.  This is
    > >both a blessing and a curse.  Steve Knecht discovered this
    > >in dealing with memory card corruptions and was able to
    > >upload memory cards that were coming up as "PLEASE
    > >RE-INSERT...".  However the checksums SHOULD be verified
    > >first and therefore this is a bug.
    > >
    > >  In fact, all that is checked is that the memory card is
    > >not write-protected and that its status is not blank and not
    > >audited (i.e. the election finished).  Thus you could upload
    > >corrupted counters and if the precinct data isn't reading
    > >properly (connection problems???) then the AV could crash or
    > >upload meaningless data.  And if there is a connection
    > >problem, the AV could write the upload audit log entry to
    > >the wrong location and corrupt a previously okay memory
    > >card.  In short, not checking means taking unknown risks
    > >with the data.
    > >
    > >  This is my fault (I wrote the code) and I'll "fix" it for
    > >the next release (1.94y?) but until then be warned, if you
    > >have a memory card that is failing the checks, bypassing the
    > >checks using this method is dangerous.
    > >
    > >  And of course we'd all prefer that these memory card
    > >corruptions just went away.  Those and computer crashes.
    > >And crime.  And lousy weather.  And...  :-)
    > >
    > >              Guy
    > >
    > >

- References:
  - Re: Multiple uploads don't verify checksums
    - From: "Steve Knecht" <skglobal@earthlink.net>

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