Abstract: Described are various embodiments of a digital user authentication device, the device comprising: a user authentication interface operable to receive as input unique user identification data required to execute a digital user authentication process; a distinct physiological sensor operable to interface with the user to acquire a physiological signal from the user to automatically confirm a live user presence during said authentication process; and a digital data processor and computer-readable memory operable to execute computer-readable instructions to invoke said user authentication process based on said unique user identification data while confirming said live user presence based on said physiological signal such that a successful user authentication is only concluded upon confirmation of said live user presence during said authentication process. Various authentication, access authorization and revocation systems and processes are also described.

Abstract: Described are various embodiments of a digital user authentication device to authenticate an authorized user. The device comprises a wearable user authentication interface operable to receive unique user identification data and a finger physiological signal; an onbody physiological sensor operable to simultaneously acquire a distinct onbody physiological signal; and a digital data processor operable to execute a user authentication process based on the unique user identification data while confirming a user presence based on the finger physiological signal, and further digitally compare the finger physiological signal and the distinct onbody physiological signal to automatically confirm that they match within a designated level of confidence so to confirm that they were both acquired from a same user.

Abstract: Described are various embodiments of a digital user authentication device, the device comprising: a user authentication interface operable to receive as input unique user identification data required to execute a digital user authentication process; a distinct physiological sensor operable to interface with the user to acquire a physiological signal from the user to automatically confirm a live user presence during said authentication process; and a digital data processor and computer-readable memory operable to execute computer-readable instructions to invoke said user authentication process based on said unique user identification data while confirming said live user presence based on said physiological signal such that a successful user authentication is only concluded upon confirmation of said live user presence during said authentication process. Various authentication, access authorization and revocation systems and processes are also described.