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tbuktu / libntru

C Implementation of NTRUEncrypt
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NTRU_AVOID_HAMMING_WT_PATENT #30

Closed rubdos closed 8 years ago

rubdos commented 8 years ago

NTRU's main strengths are high performance and resistance to quantum computer attacks. Its main drawback is that it is patent encumbered. The patents expire in 2021; when built with the NTRU_AVOID_HAMMING_WT_PATENT flag, libntru becomes patent-free in 2017.

Would you mind explaining/documenting what this NTRU_AVOID_HAMMING_WT_PATENT flag changes?

Thank you!

tbuktu commented 8 years ago

It excludes the product-form code and all parameter sets that require it. So with NTRU_AVOID_HAMMING_WT_PATENT, you only get the 12 parameter sets that become patent-free in 2017 but not the 6 that will be encumbered until 2021. I'll mention it in the README.