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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: https://github.com/PQClean/PQClean/commit/6a32796212b79a5f9126d0a933e1216313f50c16
    • Implementation license (SPDX-Identifier): Public domain , which takes it from:
    • https://github.com/jschanck/package-pqclean/tree/4d9f08c3/ntruprime, which takes it from:
    • supercop-20210604

Parameter set summary

Parameter set Security model Claimed NIST Level Public key size (bytes) Secret key size (bytes) Ciphertext size (bytes) Shared secret size (bytes)
ntrulpr653 IND-CCA2 1 897 1125 1025 32
ntrulpr761 IND-CCA2 2 1039 1294 1167 32
ntrulpr857 IND-CCA2 3 1184 1463 1312 32
ntrulpr1277 IND-CCA2 5 1847 2231 1975 32
sntrup653 IND-CCA2 1 994 1518 897 32
sntrup761 IND-CCA2 2 1158 1763 1039 32
sntrup857 IND-CCA2 3 1322 1999 1184 32
sntrup1277 IND-CCA2 5 2067 3059 1847 32

ntrulpr653 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.

ntrulpr761 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.

ntrulpr857 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.

ntrulpr1277 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.

sntrup653 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.

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.

sntrup857 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.

sntrup1277 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.

Explanation of Terms

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







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