Format-Preserving-Encryption | FPE Implementation in C

Format-Preserving-Encryption is a C library. Format-Preserving-Encryption has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

An implementation of the NIST approved Format Preserving Encryption (FPE) FF1 and FF3 algorithms in C. This follows the FF1 and FF3 schemes for Format Preserving Encryption outlined in the NIST Recommendation, released in March 2016. For FF1, it builds on and formalizes (differing from but remaining mathematically equivalent to) the FFX-A10 scheme by Bellare, Rogaway and Spies as defined here and here. For FF3, it formalizes the BPS scheme. A note about FF3: There was some recent cryptanalysis about the FF3 algorithm that is important to review. NIST has concluded that FF3 is no longer suitable as a general-purpose FPE method.