Through the identification or authentication process, decisions are made regarding access. Typically, biometric identification supports physical access controls, while biometric authentication supports logical access controls. With reliance on biometrics for asset protection, security managers must accept humanness features are dynamic, yet reproducible. Consequently, it is difficult to find a single perfect access security system employing physical and/or behavioral traits.
Voices change over time or under abnormal conditions and can be modulated. Handprints can be altered — by a cut or bruise — as well as replicated. Even eyes and ears can undergo biological transformation from one day to the next. Furthermore, behaviors can be affected by emotional or fatigue states. Thus, biometric systems developed for identifying and/or authenticating authorized users that eliminate all potential errors can be prohibitively time-consuming and expensive, especially in high-traffic areas.
“View Part I of the Biometric Technology series here“