name: SPHINCS+
type: signature
principal-submitters:
- Andreas Hülsing
auxiliary-submitters:
- Jean-Philippe Aumasson
- Daniel J. Bernstein,
- Ward Beullens
- Christoph Dobraunig
- Maria Eichlseder
- Scott Fluhrer
- Stefan-Lukas Gazdag
- Panos Kampanakis
- Stefan Kölbl
- Tanja Lange
- Martin M. Lauridsen
- Florian Mendel
- Ruben Niederhagen
- Christian Rechberger
- Joost Rijneveld
- Peter Schwabe
- Bas Westerbaan
crypto-assumption: hash-based signatures
website: https://sphincs.org/
nist-round: 3
spec-version: NIST Round 3 submission, v3.1 (June 10, 2022)
spdx-license-identifier: CC0-1.0
primary-upstream:
  source: https://github.com/PQClean/PQClean/commit/8e221ae797b229858a0b0d784577a8cb149d5789
    with copy_from_upstream patches
  spdx-license-identifier: CC0-1.0
  upstream-ancestors:
  - https://github.com/sphincs/sphincsplus
advisories:
- This algorithm is not tested under Windows.
parameter-sets:
- name: SPHINCS+-SHA2-128f-simple
  claimed-nist-level: 1
  claimed-security: EUF-CMA
  length-public-key: 32
  length-secret-key: 64
  length-signature: 17088
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHA2-128s-simple
  claimed-nist-level: 1
  claimed-security: EUF-CMA
  length-public-key: 32
  length-secret-key: 64
  length-signature: 7856
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHA2-192f-simple
  claimed-nist-level: 3
  claimed-security: EUF-CMA
  length-public-key: 48
  length-secret-key: 96
  length-signature: 35664
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHA2-192s-simple
  claimed-nist-level: 3
  claimed-security: EUF-CMA
  length-public-key: 48
  length-secret-key: 96
  length-signature: 16224
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHA2-256f-simple
  claimed-nist-level: 5
  claimed-security: EUF-CMA
  length-public-key: 64
  length-secret-key: 128
  length-signature: 49856
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHA2-256s-simple
  claimed-nist-level: 5
  claimed-security: EUF-CMA
  length-public-key: 64
  length-secret-key: 128
  length-signature: 29792
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA2: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHAKE-128f-simple
  claimed-nist-level: 1
  claimed-security: EUF-CMA
  length-public-key: 32
  length-secret-key: 64
  length-signature: 17088
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHAKE-128s-simple
  claimed-nist-level: 1
  claimed-security: EUF-CMA
  length-public-key: 32
  length-secret-key: 64
  length-signature: 7856
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHAKE-192f-simple
  claimed-nist-level: 3
  claimed-security: EUF-CMA
  length-public-key: 48
  length-secret-key: 96
  length-signature: 35664
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHAKE-192s-simple
  claimed-nist-level: 3
  claimed-security: EUF-CMA
  length-public-key: 48
  length-secret-key: 96
  length-signature: 16224
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHAKE-256f-simple
  claimed-nist-level: 5
  claimed-security: EUF-CMA
  length-public-key: 64
  length-secret-key: 128
  length-signature: 49856
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false
- name: SPHINCS+-SHAKE-256s-simple
  claimed-nist-level: 5
  claimed-security: EUF-CMA
  length-public-key: 64
  length-secret-key: 128
  length-signature: 29792
  implementations-switch-on-runtime-cpu-features: true
  implementations:
  - upstream: primary-upstream
    upstream-id: clean
    supported-platforms: all
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: false
    no-secret-dependent-branching-checked-by-valgrind: false
    large-stack-usage: false
  - upstream: primary-upstream
    upstream-id: avx2
    supported-platforms:
    - architecture: x86_64
      required_flags:
      - avx2
      operating_systems:
      - Linux
      - Darwin
    common-crypto:
    - SHA3: liboqs
    no-secret-dependent-branching-claimed: true
    no-secret-dependent-branching-checked-by-valgrind: true
    large-stack-usage: false