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-w ay) It is computationally infeasible to find any input that 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." 2005 VVSG GLOSSARY. Hash functions are used to verify the integrity of messages or data.
What is hash function?
The term Hash Function refers to a one-way mathematical function that maps input data to a fixed-length digest, designed so small input changes produce different outputs and reversal is computationally difficult. It gives election, security, legal, or technical readers a specific label for the concept rather than a broader everyday meaning.
How is hash function used in cryptography or COMSEC?
In practice, Hash Function is applied to the technical or security purpose captured by its definition: a one-way mathematical function that maps input data to a fixed-length digest. Organizations combine that function with documented procedures, authorized access, testing, monitoring, and controls appropriate to the system. The governing standard or security policy determines the exact implementation.
Why does hash function need security controls?
Understanding Hash Function matters because the concept can affect security, reliability, auditability, or trusted operation. In this glossary context, it refers to a one-way mathematical function that maps input data to a fixed-length digest. Applying the term precisely helps teams choose controls that match the actual technical function instead of assuming a broader or unrelated meaning.
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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-w ay) It is computationally infeasible to find any input that 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." 2005 VVSG GLOSSARY. Hash functions are used to verify the integrity of messages or data.
Cite this term
Election Security Glossary. (2026). Hash Function. In Election Security Glossary. Retrieved August 28, 2026, from https://electionsecurityglossary.com/glossary/hash-function
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High consensus
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High consensus
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Multi-source
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High consensus
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Multi-source
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