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An information theoretic framework is established to analyze the performance of biometric security systems. Two performance metrics, namely privacy, measured by the normalized equivocation rate of the biometric measurements, and security, measured by the rate of the key generated from the biometric measurements, are first defined. A fundamental tradeoff between these two metrics is then identified...
This is the first part of a two-part paper on the information theoretic study of biometric security systems. In this paper, the design of single-use biometric security systems is analyzed from an information theoretic perspective. A fundamental trade-off between privacy, measured by the normalized equivocation rate of the biometric measurements, and security, measured by the rate of the key generated...
The performance of reusable biometric security systems in which the same biometric information is reused in several different locations is analyzed in this paper. The scenario in which the subsystems used at different locations are jointly designed is first considered. A fundamental limit of the privacy-security tradeoff is derived. Next, an incremental design approach is studied, in which the biometric...
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