Abstract: A portable data carrier comprises a communication means and a memory with a biometric template which is intended to be compared with a biometric sample for identity check. The biometric template is divided into a private part which is adapted to be exclusively used in the portable data carrier and a public part which is adapted to be transferred, with the aid of the communication means, to an external processing unit and be used therein. Moreover, a processing unit for use in biometric identity check is described, comprising a processor and a communication means. The communication means is adapted to receive a biometric sample and a public part of a biometric template, the processor is adapted to compare the received public part of the template with the biometric sample, and the communication means is further adapted to transfer, when a comparison criterion has been satisfied, at least part of the biometric sample to the portable data carrier for further comparison on the data carrier.

Abstract: A portable data carrier comprises a memory with a biometric template which is intended to be compared with a biometric sample for identity check. The biometric template is divided into a private part which is adapted to be exclusively used in the portable data carrier and a public part which is adapted to be transferred to and used in an external processing unit. Moreover, a processing unit for use in biometric identity check is described. The processing unit is adapted to receive a biometric sample and a public part of a biometric template, compare the received public part of the template with the biometric sample, and when a comparison criterion has been satisfied, transfer at least part of the biometric sample to the portable data carrier for further comparison in the data carrier with a private part of the template. A method for recording a biometric template and a biometric identity check is also described.