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What is a hash or checksum?

A hash is the outcome of running an algorithm on data, called a hash function. The hash function transforms a long string of characters into a shorter string of characters. That shorter string of characters (the hash) represents the original string and is typically used in computer programs and cryptography.

A hash is also referred to as a:

  • Checksum
  • Hash sum
  • Hash value
  • Hash code
  • Hash
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