Recommendation for Block Cipher Modes of Operation: Methods for Format-Preserving Encryption
Morris J. Dworkin
This Recommendation specifies two methods, called FF1 and FF3, for format-preserving encryption. Both of these methods are modes of operation for an underlying, approved symmetric-key block cipher algorithm.
Recommendation for Block Cipher Modes of Operation: Methods for Format-Preserving Encryption, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.800-38G
(Accessed December 3, 2022)