The Capacity Region of Identification, Secrecy and Compression Rates in Biometric Identification Systems

摘要

In this study, we investigate fundamental tradeoff among identification, secrecy and compression rates under the condition that the prior distribution of an identified individual is unknown. We combine the techniques developed by Tuncel (2009) and Ignatenko and Willems (2010) to analyze the capacity region of three rate tuples mentioned above. We show that when the secrecy rate is zero, the capacity region of identification and compression rates is characterized as a similar form as the one given by Tuncel. For the achievable range of secrecy rate, it turns out to be larger than the result derived by Ignatenko and Willems.