bmd

Voting Village·30 min

• DEF CON
• Hardware
• Date: Aug 2021
• Location: Las Vegas

Kevin Skoglund

Kevin Skoglund decodes 1D and 2D barcodes on ballot-marking devices (ES&S, Dominion, Unisyn), evaluating the security risks of machine-readable votes.

Voting Village·24 min

• DEF CON
• Policy
• Date: Aug 2020
• Location: Online

Philip B. Stark · Ran Xie

Demonstrates mathematical limitations showing that pre- and post-election logic and accuracy testing cannot prove ballot-marking devices did not alter votes.