Iris biometrics is considered one of the most accurate and robust methods of identity verification. Individually unique iris features can be presented in a compact binary form easily compared with reference template to confirm identity. However, when templates or features are disclosed, iris biometrics is no longer suitable for verification. Therefore, there is a need to perform iris feature matching without revealing the features itself and reference template. The paper proposes an extension of the standard iris-based verification protocol that introduces features and a template locking mechanism, which guarantees that no sensitive information is exposed.

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