A function that maps a bit string of arbitrary length to a fixed length bit string. Approved hash functions satisfy the following properties: 1) (One-way) It is computationally infeasible to find any input which maps to any pre-specified output, and 2) (Collision resistant) It is computationally infeasible to find any two distinct inputs that map to the same output. (SP 800-21) (NISTIR)
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A function that maps a bit string of arbitrary length to a fixed length bit string. Approved hash functions satisfy the following properties: 1) (One-way) It is computationally infeasible to find any input which maps to any pre-specified output, and 2) (Collision resistant) It is computationally infeasible to find any two distinct inputs that map to the same output. (SP 800-21) (NISTIR)
Cite this term
Election Security Glossary. (2026). Cryptographic Hash Function. In Election Security Glossary. Retrieved August 21, 2026, from https://electionsecurityglossary.com/glossary/cryptographic-hash-function
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