In this chapter, we examine the implications of ageing for the usability of biometric solutions. We first set out what usability means, and which factors need to be considered when designing a solution that is ‘usable’. We review usability successes and issues with past biometric techniques, in the context of a set of solutions, before considering how usability will be affected for ageing users because of the physical and cognitive changes they undergo. Finally, we identify the opportunities and challenges that ageing presents for researchers, developers and operators of biometric systems
