The January/March 2008 issue of the Journal of Electronic Imaging (JEI) is publishing a special section on the current state of the art in biometric user authentication systems. Manuscripts are due 31 May 2007. Suggested topics include: * Advanced evaluation methodologies for largely deployed biometrics * Biometric cryptosystems and biometric hashing: new concepts and their validation * Biometric image processing in embedded and mobile devices * Impacts of nontechnical issues of biometrics: novel experimental studies and field evaluations of social, cultural, and demographic factors * Innovative theoretical models for multiple-expert systems * Multiple-expert systems (e.g., multimodal, multisensor, and multialgorithmic systems): current and future problems, solutions, and comparative studies * Sensors for biometric images: novel techniques and issues of interoperability * System security for biometrics: original contributions to reference image and template protection, system security, secure protocols, and process design * Usability and user interfaces for biometrics: advances in design and perceived usability