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Biometric Data Protection

Protect biometric data — fingerprints, facial geometry, iris, voice, and behavioral patterns — under heightened special-category rules and consent requirements.

Privacy intermediate ⏱ 40 min

Biometric Data Protection

Overview

Biometric data is information derived from physical, physiological, or behavioral characteristics that allows or confirms unique identification — facial geometry, fingerprints, iris/retina scans, voiceprints, gait, and keystroke dynamics. Because it is permanent and cannot be reissued after a breach, it carries elevated risk and attracts the strictest tier of privacy protection.

Why It Matters

  • Irreversibility: Unlike a password, a compromised fingerprint or face template cannot be changed, making breaches uniquely harmful.
  • Special-category status: Under GDPR Article 9, biometric data used for unique identification is prohibited from processing absent a specific exception (usually explicit consent).
  • Aggressive enforcement: Illinois’ BIPA permits a private right of action, producing nine-figure settlements (e.g. Facebook’s $650M settlement).

Key Regulations & Frameworks

  • GDPR Article 9 — special categories; explicit consent or another Article 9(2) condition required.
  • Illinois BIPA (740 ILCS 14) — written consent, retention/destruction schedule, ban on sale; private right of action with statutory damages.
  • Texas CUBI and Washington HB 1493 — consent and retention rules, AG-only enforcement.
  • CCPA/CPRA — biometric data is “sensitive personal information” with right to limit use.
  • EU AI Act — restricts real-time remote biometric identification in public spaces.

Core Requirements

  1. Explicit, informed consent captured and recorded before collection.
  2. Purpose limitation — use biometrics only for the specific identification purpose disclosed.
  3. Retention & destruction schedule — delete templates once the purpose is satisfied or after a defined period (BIPA: within 3 years of last interaction).
  4. Template protection — store irreversible, salted templates rather than raw images; encrypt at rest and in transit.
  5. No unlawful sale or disclosure of biometric identifiers.
  6. DPIA for biometric systems, which are presumptively high-risk.

Best-Practice Checklist

  • Confirm whether processing triggers special-category / sensitive-data rules
  • Obtain and log explicit written consent before collection
  • Publish a biometric retention and destruction policy
  • Store protected templates, never raw biometrics, with strong encryption
  • Complete a DPIA before deploying biometric identification
  • Map obligations across every US state where subjects reside
  • Provide an alternative to biometric authentication where feasible

Resources

Guidance only — biometric rules vary sharply by jurisdiction; consult qualified counsel.