Punchscan
Punchscan is an optical scan vote counting system invented by cryptographer David Chaum. Punchscan is designed to offer integrity, privacy, and transparency. The system is voter-verifiable, provides an end-to-end (E2E) audit mechanism, and issues a ballot receipt to each voter. The system won grand prize at the 2007 University Voting Systems Competition.

The computer software which Punchscan incorporates is open-source; the source code was released on 2 November 2006 under a revised BSD licence. However, Punchscan is software independent; it draws its security from cryptographic functions instead of relying on software security like DRE voting machines. For this reason, Punchscan can be run on closed source operating systems, like Microsoft Windows, and still maintain unconditional integrity.

The Punchscan team, with additional contributors, has since developed Scantegrity.
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optical scan
Concept
Q2672742
vote counting system
Concept
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cryptographer
Concept
Q1173973
David Chaum
PER
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end-to-end (E2E) audit
Concept
Q29535030
ballot receipt
Concept
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University Voting Systems Competition
EVE
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computer software
Concept
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open-source
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source code
Concept
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BSD licence
Concept
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cryptographic
Concept
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software security
Concept
Q5206047
DRE voting machine
Concept
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closed source
Concept
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operating system
Concept
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Microsoft Windows
Concept
Q2228957
Scantegrity
UNK
Q2118343
Punchscan
MEDIA
Q2118343
Punchscan
MEDIA
Q2118343
Punchscan
MEDIA
Q2118343
Punchscan
MEDIA
Q2118343
Punchscan
MEDIA
Q2118343
Punchscan
MEDIA
2007-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2007
DATE
2006-11-02T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2 November 2006
DATE
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
use
instance of
instance of