Cryptographic hash function: Difference between revisions
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[[Category:Encyclopedia]]
A [[wp:cryptographic hash function|cryptographic hash function]], also known as a ''collision resistant hash function'', maps a message (of any length) to a digest (of a fixed length), and has the following three properties:<ref>Dobbertin, Bosselaers, Preneel. [http://homes.esat.kuleuven.be/~bosselae/ripemd160.html "RIPEMD-160, a strengthened version of RIPEMD"]</ref><ref>
[https://en.wikibooks.org/wiki/Cryptography/Hashes Wikibooks: Cryptography: Hashes]
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* ''Preimage resistance.'' It is too difficult to invert the function and find an original message from its digest.
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== Algorithms ==
[[SHA-256]] is the recommended stronger alternative to [[SHA-1]] and [[RIPEMD-160]], which in turn are stronger than [[MD5]], which in turn is stronger than [[MD4]].
== References ==
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