Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for a biometric authentication system. In one aspect, a method includes broadcasting, through a transceiver, a signal that includes a kiosk identifier; receiving, from a server system, a reference image of the user based on a mobile computing device associated with the user having received the signal and providing the kiosk identifier to the server system; capturing, with a camera, an image of the user; and authenticating the user based on a comparison of the captured image of the user to the reference image of the user based on a comparison of the captured image of the user to the reference image of the user.

Abstract: The technology described in this document can be embodied in a method that includes receiving at a second device a request for data sharing from a first device, and receiving a first file package associated with an application installed on the first device, and the file package includes a first portion of information usable for installation of the application on the second device. The method also includes processing the first file package to obtain the first portion of information usable for installing the application on the second device, providing authentication information for downloading a second file package to a remote computer device different from the first device, and installing the application on the second device using the first portion of information and the second portion of information.

Abstract: The technology described in this document can be embodied in a method that includes receiving at a second device a request for data sharing from a first device, and receiving a first file package associated with an application installed on the first device, and the file package includes a first portion of information usable for installation of the application on the second device. The method also includes processing the first file package to obtain the first portion of information usable for installing the application on the second device, providing authentication information for downloading a second file package to a remote computer device different from the first device, and installing the application on the second device using the first portion of information and the second portion of information.