How the ExpressVote XL Could Alter Ballots
An exploration of the “Opportunity to Mark” design flaw
https://securiosa.com/posts/how_the_expressvote_xl_could_alter_ballots.html
Deconstructing an ES&S ExpressVote Paper Record
An explanation of how barcodes correspond to ballot selections.
https://securiosa.com/posts/deconstructing_expressvote_records.html
How ExpressVote Barcodes Could Be Modified
How the ExpressVote XL could use the Opportunity to Mark design flaw to change the vote selections stored in barcodes
https://securiosa.com/posts/how_expressvote_barcodes_could_be_modified.html