mysto / python-fpe

FPE - Format Preserving Encryption with FF3 in Python

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Why is there no FPE-FF1 implementation?

liyangzbx opened this issue · comments

commented

Microfocus claims a patent on the FF1 algorithm and requires a license for its use. The license cost is revenue based, in the range of 2%. The license does not permit the use of FF1 in open source code, and using such open source code would require a license.

I'm aware people have implemented FF1 in open source without a license. However, I have corresponded with Microfocus on this topic and such use could be subject to litigation.