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Sociedade Brasileira de Telecomunicações

User Identification and Key Regeneration System Employing Rotated Reference Images of the Iris


A new test called rotation search is proposed for user identification and cryptographic key regeneration in systems employing a digital representation of the iris (iris code). When applied to the BIOSECURE, CASIA and NIST-ICE data bases the rotation search shows, on average, a two fold reduction in false rejection ratio (FRR) with a false acceptance ratio (FAR) equal to zero, in comparison with the standard search employed in other systems. The highest improvement reached in FRR by the rotation search against the standard search is 100 times, and in many cases the measured FRR is equal to zero.

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