NTRU Prime

Several ideal-lattice-based cryptosystems have been broken by recent attacks that exploit special structures of the rings used in those cryptosystems. The same structures are also used in the leading proposals for post-quantum lattice-based cryptography, including the classic NTRU cryptosystem and typical Ring-LWE-based cryptosystems.

NTRU Prime tweaks NTRU to use rings without these structures. Streamlined NTRU Prime is a public-key cryptosystem optimized from an implementation perspective, subject to the standard design goal of IND-CCA2 security. Streamlined NTRU Prime 4591761 is Streamlined NTRU Prime with high-security post-quantum parameters. The resulting sizes and speeds show that reducing the attack surface has very low cost.

Contributors (alphabetical order)


This work was supported by the Netherlands Organisation for Scientific Research (NWO) under grant 639.073.005.

This work was supported by the Commission of the European Communities through the Horizon 2020 program under project number 645622 (PQCRYPTO) and project number 645421 (ECRYPT-CSA).

This work was supported by the U.S. National Science Foundation under grant 1314919. "Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

Calculations were carried out on the Saber cluster of the Cryptographic Implementations group at Technische Universiteit Eindhoven.

Version: This is version 2017.08.17 of the Intro web page.