US Patent 11398918 Passive user authentication

A method may include transmitting, at a mobile device executing a keyboard application, a request for a user specific data value to a computing device; receiving, from the computing device, an authentication request with a challenge message; encrypting the challenge message with a private key associated with the keyboard application; transmitting the encrypted challenge message to the computing device for authentication by the computing device; receiving the user specific data value from the server based on the server successfully authenticating the encrypted challenge message; and presenting the user specific data value in the keyboard application on the mobile device.