The issue of biometric security has become a major research area recently. While systemsbased on iris-recognition, DNA analysis and fingerprinting are being deployed, there areinstances where these alone cannot provide fool-proof security. Biometric Security from anInformation-Theoretical Perspective provides an overview of the state-of-the-art of biometricsecurity systems. Using information theoretic techniques it discusses some of the mostpromising methods to provide practical, but safe, systems.Biometric Security from an Information-Theoretical Perspective studies a number of problemsrelated to the design of biometric secrecy systems for both authentication and identification.First, it reviews the problem of secret sharing in order to set theoretical grounds for thesubsequent discussion of secret-key rates and privacy leakage in biometric secrecy systems.Biometric authentication systems are discussed in depth using discrete and Gaussian biometricsources, before describing biometric identification techniques in detail. Since biometric data aretypically used for both identification and authentication purposes, the trade-off betweenidentification, secret-key and privacy-leakage rates are determined.Finally, practical considerations are treated. The realization of binary biometric authenticationsystems with chosen secret keys, called fuzzy commitment, is analyzed. The monograph concludes by investigating how binary quantization of biometric sequences influences the performance of biometric secrecy systems with respect to secret-key rates and privacy leakage.Biometric Security from an Information-Theoretical Perspective is an in-depth review of thetopic, which gives the reader an excellent starting point for further research.