Value computed on data to detect error or manipulation. See Checksum. (CNSSI-4009) (NISTIR)
What is a hash total?
A hash total is a value derived from hashing a defined set of data and using the result as an integrity check. If the underlying election file or collection changes, a newly calculated hash should normally differ. It is useful for detecting unexpected changes, but it does not by itself prove that the original data was correct.
How can a hash total help detect changed election data?
Election teams can record a trusted hash value for a file or dataset and later recalculate the hash. Matching values provide evidence that the checked data has not changed since the reference hash was created. The value is strongest when the original hash is independently protected and the hashing method and scope are documented.
Is a hash total the same as a vote total?
No. A hash total is an integrity-check value produced by a hash function, while a vote total is the numerical count of votes for a candidate, option, or contest. A hash can be calculated over a file containing vote totals, but the hash itself does not reveal or replace the underlying election count.
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Value computed on data to detect error or manipulation. See Checksum. (CNSSI-4009) (NISTIR)
Cite this term
Election Security Glossary. (2026). Hash Total. In Election Security Glossary. Retrieved September 3, 2026, from https://electionsecurityglossary.com/glossary/hash-total
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