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In [[cryptography]], there are several methods to use a [[block cipher]] to build a [[cryptographic hash function]]. The methods resembles the [[block cipher modes of operation]] usually used for encryption. Three such methods to turn any normal block cipher into a hash are '''Davies-Meyer''', '''Matyas-Meyer-Oseas''' and '''Miyaguchi-Preneel'''. They are described in detail further down.
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Variations of this method replace XOR with any other group operation, such as addition on 32-bit unsigned integers.
:''Note: There is some more information in the [[Davies-Meyer hash|old Davies-Meyer article]] that has not been merged to this article yet.''
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