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PIN

Definition(s):

  A memorized secret typically consisting of only decimal digits.
Source(s):
NIST SP 1800-17b under Personal Identification Number
NIST SP 1800-17c under Personal Identification Number

  A secret number that a cardholder memorizes and uses to authenticate his or her identity as part of multifactor authentication.
Source(s):
NIST SP 1800-12b under personal identification number