A cryptographic hash function, also sometimes called a , is a primitive transforming a message of arbitrary size into a message of fixed size, called a . Cryptographic hash functions are used for authentication, , and . digest function cryptographic digest digital signatures message authentication codes To be used for cryptography, a hash function must have these qualities: quick to compute (because they are generated frequently) not invertible (each digest could come from a very large number of messages, and only brute-force can generate a message that leads to a given digest) tamper-resistant (any change to a message leads to a different digest) collision-resistant (it should be impossible to find two different messages that produce the same digest) Cryptographic hash functions such as MD5 and SHA-1 are considered broken, as attacks have been found that significantly reduce their collision resistance. View Previous Terms: Block cipher mode of operation Certificate authority Challenge-response authentication Cipher Cipher suite Ciphertext CORS CORS-safelisted request header CORS-safelisted response header Cross-site scripting Cryptanalysis Cryptography CSP CSRF Decryption Digital certificate DTLS (Datagram Transport Layer Security) Encryption Forbidden header name Forbidden response header name Hash HMAC HPKP HSTS HTTPS Key MitM OWASP Preflight request Public-key cryptography Reporting directive Robots.txt Same-origin policy Session Hijacking SQL Injection Symmetric-key cryptography TOFU Transport Layer Security (TLS) Credits Source: https://developer.mozilla.org/en-US/docs/Glossary/Cryptographic_hash_function Published under license Open CC Attribution ShareAlike 3.0

Glossary of Security Terms: Cryptographic Hash Function

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