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1 definition found
 for message digest function
From The Free On-line Dictionary of Computing (30 December 2018) :

  one-way hash function
  message digest function
      (Or "message digest function") A one-way
     function which takes a variable-length message and produces a
     fixed-length hash.  Given the hash it is computationally
     infeasible to find a message with that hash; in fact one can't
     determine any usable information about a message with that
     hash, not even a single bit.  For some one-way hash functions
     it's also computationally impossible to determine two messages
     which produce the same hash.
     A one-way hash function can be private or public, just like an
     encryption function.  MD5, SHA and Snefru are examples of
     public one-way hash functions.
     A public one-way hash function can be used to speed up a
     public-key digital signature system.  Rather than sign a
     long message, which can take a long time, compute the one-way
     hash of the message, and sign the hash.
     sci.crypt FAQ

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