A Python implementation of the FFX Mode of Operation for Format-Preserving Encryption (FPE). Format-preserving encryption encrypts data while preserving its format. For example, a 16-digit credit card ...

At the time, Marriott claimed that its data was secured by AES-128 encryption but now admits it was not. In an April hearing for a case involving customers who sued the hotel chain, Marriott ...

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 ...