Independent verification (IV) systems or Independent Dual Verification (IDV) are

voting machine A voting machine is a machine used to record votes in an election without paper. The first voting machines were mechanical but it is increasingly more common to use '' electronic voting machines''. Traditionally, a voting machine has been defi ...

s that produce at least two independent auditable records of votes where the second record is used to check the first. To be considered "independent" at least one of the records must not be editable by the

and be directly verifiable by the voter. These systems must allow for the multiple records to be able to be cross-checked. EAC'
Voluntary Voting System Guidelines Volume 1
§7.8 The goal of an IV system is to increase the security, and maintain the integrity of the voting tally. The theory is that any corruption would need to corrupt two separate records to be undetected by an audit. IV systems can include some Voter Verified Paper Audit Trail (VVPAT) systems,

End-to-end auditable voting systems End-to-end auditable or end-to-end voter verifiable (E2E) systems are voting systems with stringent integrity properties and strong tamper resistance. E2E systems often employ cryptographic methods to craft receipts that allow voters to verify t ...

, witness systems, and some

optical scan voting system An optical scan voting system is an electronic voting system and uses an optical scanner to read marked paper ballots and tally the results. History Marksense systems While mark sense technology dates back to the 1930s and optical mark recog ...

s. EAC'
Voluntary Voting System Guidelines Volume 1
§C.1.2.4

References

Election technology {{election-stub

See also

References