Abstract
Biometric de-identification is an emerging topic of research within the information security domain that integrates privacy considerations with biometric system development. A comprehensive overview of research in the context of authentication applications spanning physiological, behavioral, and social-behavioral biometric systems and their privacy considerations is discussed. Three categories of biometric de-identification are introduced, namely complete de-identification, auxiliary biometric preserving de-identification, and traditional biometric preserving de-identification. An overview of biometric de-identification in emerging domains such as sensor-based biometrics, social behavioral biometrics, psychological user profile identification, and aesthetic-based biometrics is presented. The article concludes with open questions and provides a rich avenue for subsequent explorations of biometric de-identification in the context of information privacy.
Highlights
Biometric de-identification is an emerging topic of research within the information security domain that integrates privacy considerations with biometric system development
We explore the differences among de-identification methodologies in depth, create a taxonomy of de-identification methods, and introduce new types of de-identification based on auxiliary biometric features
This article provided a comprehensive overview of the domain of biometric information de-identification for ensuring user data privacy
Summary
We start by introducing the definitions of biometrics, traditional biometrics, soft biometrics, social behavioral biometrics, and emerging biometrics. The purpose of such de-identification methods is to remove the ability to identify a person using the given biometric, while still retaining soft biometric traits This type of de-identification would prevent face recognition technologies from identifying an individual, while still retaining their gender or age information [16], making it possible for a user to post a natural-looking video message on a public forum anonymously. The category definitions include the previously introduced taxonomy, where the notion of soft biometrics is expanded to include emerging auxiliary traits: Auxiliary biometric preserving de-identification; Traditional biometric preserving biometric de-identification.
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