  Despite the increasing adoption of biometric technologies, their regulation
has not kept up with the same pace, particularly with regard to safeguarding
individuals' privacy and personal data. Policymakers may struggle to comprehend
the technology behind biometric systems and their potential impact on
fundamental rights, resulting in insufficient or inadequate legal regulation.
This study seeks to bridge this gap by proposing a taxonomy of biometric
technologies that can aid in their effective deployment and supervision.
Through a literature review, the technical characteristics of biometric systems
were identified and categorised. The resulting taxonomy can enhance the
understanding of biometric technologies and facilitate the development of
regulation that prioritises privacy and personal data protection.
