This code package contains the source code that accompanies the paper "High-speed key encapsulation from NTRU". It contains a C reference implementation and an optimized AVX2 implementation, in the respective directories. When referring to this implementation, please refer to the original publication:
Andreas Hülsing, Joost Rijneveld, John Schanck, and Peter Schwabe. High-speed key encapsulation from NTRU. Cryptographic Hardware and Embedded Systems – CHES 2017, LNCS 10529, pp. 232-252, Springer, 2017. https://eprint.iacr.org/2017/667
Note that the source code differs slightly from the NTRU-HRSS-KEM scheme that was submitted to NIST's Post-Quantum Cryptography project in November 2017. For the updated scheme, refer to the repository for the NIST submission instead.