Really interesting two part analysis of the audit conducted after the 2020 election in Windham, New Hampshire.

Based on preliminary reports published by the team of experts that New Hampshire engaged to examine an election discrepancy, it appears that a buildup of dust in the read heads of optical-scan voting machines (possibly over several years of use) can cause paper-fold lines in absentee ballots to be interpreted as votes… New Hampshire (and other states) may need to maintain the accuracy of their optical-scan voting machines by paying attention to three issues:…

Read More Andrew Appel on New Hampshire’s Election Audit

Andrew Appel discusses Georgia’s voting machines, how the paper ballots facilitated a recount, and the problem with automatic ballot-marking devices:

Suppose the polling-place optical scanners had been hacked (enough to change the outcome). Then this would have been detected in the audit, and (in principle) Georgia would have been able to recover by doing a full recount. That’s what we mean when we say optical-scan voting machines have “strong software independence”­you can obtain a trustworthy result even if you’re not sure about the software in the machine on election day…

Read More Georgia’s Ballot-Marking Devices