liboqs/docs/algorithms/kem/ntruprime.md

NTRU-Prime

• Algorithm type: Key encapsulation mechanism.
• Main cryptographic assumption: NTRU.
• Principal submitters: Daniel J. Bernstein, Billy Bob Brumley, Ming-Shing Chen, Chitchanok Chuengsatiansup, Tanja Lange, Adrian Marotzke, Bo-Yuan Peng, Nicola Tuveri, Christine van Vredendaal, Bo-Yin Yang.
• Authors' website: https://ntruprime.cr.yp.to
• Specification version: supercop-20200826.
• Primary Source:
  • Source: 4c9e5a3aa7
  • Implementation license (SPDX-Identifier): Public domain
• Ancestors of primary source:
  • https://github.com/jschanck/package-pqclean/tree/4d9f08c3/ntruprime, which takes it from:
  • supercop-20210604

Parameter set summary

Parameter set	Parameter set alias	Security model	Claimed NIST Level	Public key size (bytes)	Secret key size (bytes)	Ciphertext size (bytes)	Shared secret size (bytes)	Keypair seed size (bytes)
sntrup761	NA	IND-CCA2	2	1158	1763	1039	32	NA

sntrup761 implementation characteristics

Implementation source	Identifier in upstream	Supported architecture(s)	Supported operating system(s)	CPU extension(s) used	No branching-on-secrets claimed?	No branching-on-secrets checked by valgrind?	Large stack usage?‡
Primary Source	clean	All	All	None	True	True	False
Primary Source	avx2	x86_64	Linux,Darwin	AVX2	False	True	False

Are implementations chosen based on runtime CPU feature detection? Yes.

‡For an explanation of what this denotes, consult the Explanation of Terms section at the end of this file.

Explanation of Terms

• Large Stack Usage: Implementations identified as having such may cause failures when running in threads or in constrained environments.