Secure Biometric Authentication Architecture

A method of securely processing biometric sensor data, the method comprising:

• encrypting a set of machine-learning (ML) models using a subsystem of a wearable device that is isolated from a main system-on-a-chip (SoC) of the wearable device;
• storing, via the subsystem, encrypted biometric templates, wherein access to the encrypted biometric templates is restricted to the subsystem;
• verifying, using the subsystem, authenticity of an ML model from the set of ML models prior to use of the ML model;
• validating biometric sensor data by applying the ML model using an ML accelerator of the wearable device, wherein access to the biometric sensor data is restricted to the ML accelerator;
• generating, via the ML accelerator, a biometric signature from validated biometric sensor data, wherein the biometric signature is generated using at least one ML model of the set of ML models;
• and
• authenticating, using the subsystem, the biometric signature against stored encrypted biometric templates.

A non-transitory, computer-readable storage medium storing a set of instructions that, when executed by a computing system, cause the computing system to perform a process, the process comprising:

• encrypting a set of machine learning (ML) models using a subsystem of a wearable device that is isolated from a main system-on-a-chip (SoC) of the wearable device;
• storing, via the subsystem, encrypted biometric templates, wherein access to the encrypted biometric templates is restricted to the subsystem;
• verifying, using the subsystem, authenticity of an ML model from the set of ML models prior to use of the ML model;
• validating biometric sensor data by applying the ML model using an ML accelerator of the wearable device, wherein access to the biometric sensor data is restricted to the ML accelerator;
• generating, via the ML accelerator, a biometric signature from validated biometric sensor data, wherein the biometric signature is generated using at least one ML model of the set of ML models;
• and
• authenticating, using the subsystem, the biometric signature against stored encrypted biometric templates.