Abstract: A system can include a memory and a processing device, operatively coupled to the memory, to perform operations including receiving a header block of an ordered set of blocks. The header block includes a header block payload and a first digest. The operations further include authenticating, based on the header block payload, the header block, and receiving a first data block of the ordered set of blocks. The first data block includes a first data block payload and a second digest. The operations further include authenticating, based on the first digest, the first data block, and processing the first data block payload.

Abstract: Systems and methods for configuring an authenticator to provide a secure user authentication to an application processing a task requesting the authentication are provided. The authenticator performs the biometric authentication upon receiving a match request from an application processing the task. Subsequently, the authenticator generates a match score based on a comparison between biometric input data captured by a sensor associated with the authenticator and stored enrollment data in order to determine a match result based on the match score. The authenticator then determines a level of confidence in the match result and provides the match result and the level of confidence to the application processing the task. Additionally, systems and methods provide a secure way to communicate the match result and the level of confidence over an untrusted communication channel.