The process of using a mathematical algorithm against data to produce a numeric value that is representative of that data.
Sources:
CNSSI 4009-2015
from
NIST SP 800-72
NIST SP 800-101 Rev. 1
under Hashing
NIST SP 800-72
under Hashing
A method of calculating a relatively unique output (called a hash digest) for an input of nearly any size (a file, text, image, etc.) by applying a cryptographic hash function to the input data.
Sources:
NISTIR 8202
under Hashing