{
  "slug": "quarkslab",
  "name": "Quarkslab",
  "url": "https://www.quarkslab.com",
  "hq": "Paris, France",
  "focus": "Reverse engineering, cryptography, and secure implementation research",
  "summary": "Quarkslab is a French security research firm whose cryptography team has published implementation bug-hunting work on HQC and analysis of Signal's post-quantum Triple Ratchet, and performs cryptographic audits for vendors and open-source projects.",
  "pqc_services": [
    "Cryptographic implementation audits, including post-quantum KEMs and signatures",
    "Automated conformance testing of post-quantum implementations"
  ],
  "evidence": [
    [
      "Finding bugs in implementations of HQC",
      "https://blog.quarkslab.com/finding-bugs-in-implementations-of-hqc-the-fifth-post-quantum-standard.html"
    ],
    [
      "Signal's ratchet goes post-quantum",
      "https://blog.quarkslab.com/triple-threat-signals-ratchet-goes-post-quantum.html"
    ]
  ],
  "rank": 6,
  "page": "https://pqaudit.org/auditors/quarkslab/",
  "updated": "2026-09-12"
}