Example embodiments relate to controlling secured access to electronically provided application functionality or content. An Internet browser executing on a first computing device initiates periodic polling of a paired second computing device associated with a user for measurements of short range communication protocol signal strength of the second computing device and determines that the second computing device is within an authentication distance of the first computing device. The secure Internet browser transmits an authentication request comprising a device identifier of the second computing device. Responsive to transmitting the authentication request, the secure Internet browser receives an authentication response indicating authentication confirmation, and responsive thereto, the secure Internet browser provides access to a controlled-access application by transmitting a request to a content server for a presentation of the controlled-access application, receiving from the content server a presentation associated with the user, and directing display of the presentation via a user interface.