Continuous Authentication

This chapter introduces continuous biometric authentication. Initially the concept is introduced and the key components are discussed. The device types that continuous biometric authentication systems have been designed for and the sensing capabilities available on these devices are then described. Next, the datasets that these systems can be constructed with are noted. The user profiles and the way that features, classification, and biometric fusion may be used are then discussed. Following this, the evaluation techniques and approaches for system assessment are described. Lastly, an overview of user perceptions, threats, and possible use cases for continuous biometric authentication systems are provided.