ID Tech

Biometric Template Protection

Techniques like cancellable biometrics and encryption safeguard stored biometric templates from misuse or breach.

Overview

Template protection techniques reduce the risk that stolen biometric data can be reused or inverted, supporting privacy regulations.

How it works

  1. Transform or encrypt templates at enrollment.
  2. Perform matching in protected form (e.g., homomorphic encryption or secure enclaves).
  3. Allow template revocation and reissue when needed.

Common use cases

  • Privacy-sensitive biometric databases
  • Mobile devices with secure enclaves
  • Research on secure multi-party matching

Strengths and limitations

Strengths: Limits impact of data breaches; supports revocation.
Limitations: Performance overhead; interoperability challenges.

Key terms

  • Cancellable biometrics: Reversible transform of templates.
  • Biometric cryptosystem: Uses cryptographic schemes to protect matching.

References

Latest Data Cards

  • Data Card

    SEALSQ and Palm Technologies plan quantum-resistant palm payment hardware

    2026-08-19CC-BY-4.0palmprint-recognitiontemplate-protection

    SEALSQ and India's Palm Technologies began a design programme pairing palm biometric payment readers with post-quantum secure hardware.

    • The design uses the SEALSQ QS7001 secure microcontroller.
    • It implements the Kyber and Dilithium post-quantum algorithms.
    • The first target application is the MetPalm V1 reader for metro and toll payments.
    Open card
  • Data Card

    Trust Stamp reports revenue growth and selection for EU semiconductor project

    2026-08-13CC-BY-4.0template-protection

    Trust Stamp reported $1.66 million in first-half revenue, up 22 percent, and selection for an EU Important Project of Common European Interest running 2027 to 2032.

    • Revenue reached $1.66 million for the six months to June 30, a 22 percent year-over-year increase.
    • The EU project runs from 2027 to 2032.
    • The work binds device identity to a verified human identity using hardware-rooted security and biometric tokenization.
    Open card
  • Data Card

    Suprema launches BioStation 3 Max with EAL6+ secure element

    2026-05-14CC-BY-4.0facial-recognitionmobile-idtemplate-protectionsuprema-inc

    Suprema launched BioStation 3 Max, a flagship biometric access terminal with an EAL6+ certified secure element and support for facial recognition, mobile access, and RFID credentials.

    • The EAL6+ secure element is intended to protect biometric templates and cryptographic keys against physical and digital tampering.
    • The device supports multiple credential modes, including face, mobile access, and RFID cards.
    • The positioning targets high-security enterprise and critical infrastructure access-control environments.
    Open card
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Frequently Asked Questions

What is cancellable biometrics?
A method that transforms templates so they can be revoked and reissued if compromised.
How is matching done on protected data?
Approaches include secure enclaves for plaintext-in-TEE matching, helper-data schemes, or privacy-preserving computation (e.g., homomorphic encryption).
Can template protection stop inversion attacks?
Properly designed schemes reduce the risk and utility of reconstructions, but security depends on threat models and implementation.