Punchscan

Wikipedia:

Punchscan is an optical scan voting system invented by cryptographer David Chaum and is designed to offer integrity, privacy, and transparency. The system is voter-verifiable, provides an end-to-end audit mechanism, and issues a ballot receipt to each voter. The source code was released on November 2, 2006 under a revised BSD licence.

★ Wednesday, 25 July 2007