{
  "slug": "proof-without-surveillance",
  "title": "Behavioural biometrics is surveillance with better branding",
  "summary": "Two technologies claim to answer is this the right person, and they are opposites. One watches continuously and estimates. The other asks once and proves.",
  "lede": "Behavioural biometrics promises security that costs the user nothing, by measuring how a person's body operates a device and comparing it against a stored profile. It is a detector, it is biometric, and it watches continuously. For authorising a consequential action, it is the wrong instrument, and that stays true no matter how accurate it gets.",
  "date": "2026-09-18",
  "reading_time": "13 min read",
  "category": "Research",
  "tags": [
    "behavioural biometrics",
    "BIPA",
    "GDPR Article 9",
    "continuous authentication",
    "privacy",
    "keystroke dynamics",
    "proof not detection"
  ],
  "image": "https://cdn.twc.sh/images/igcache/Proof%20Without%20Surveillance/1200_630/blog.jpg",
  "url": "/blog/proof-without-surveillance.html",
  "wordcount": 4118,
  "related": [
    "detection-debt",
    "proof-of-work-not-surveillance",
    "identity-failure-map"
  ],
  "schema": "Article"
}