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A password consisting only of decimal digits.
SOURCE: SP 800-63
A secret that a claimant memorizes and uses to authenticate his or her identity. PINs are generally only decimal digits.
SOURCE: FIPS 201
An alphanumeric code or password used to authenticate an identity.
SOURCE: FIPS 140-2
A short numeric code used to confirm identity.
SOURCE: CNSSI-4009
