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Cryptographic hash

security

Also called: hash

Plain-language definition

Plain-language definition

A one-way function that produces a fixed-size fingerprint of data.

Why it matters

Hashes support integrity checks and password storage designs, but an unsalted fast hash is unsafe for passwords.

Technical detail

A cryptographic hash deterministically maps input to a digest while aiming to resist preimage, second-preimage, and collision attacks.

Examples

  • The system verifies a downloaded release by comparing its published hash.

Sources and review

Reviewed July 12, 2026 by e2e-1783854138445-0citu53rtqqe@test.repairyour.tech. Next review due January 11, 2027.

  1. Glossary of Key Information Security Terms — National Institute of Standards and Technology Accessed 7/11/2026

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