An apparatus, method, and computer readable medium that include establishing a video connection between the apparatus and a first device, in response to establishing the video connection, transmitting a token to a second device equipped with a display, the token being displayed on the display of the second device, receiving visual data comprising the token displayed on the display of the second device, the visual data being generated by the first device, that includes a camera, capturing the token displayed on the display of the second device, accessing a frame buffer of a graphics processing unit (GPU), analyzing, in the frame buffer of the GPU, a frame representing a section of the visual data to detect the token, and in response to the token being detected in the visual data, generating an authentication to authenticate the video connection between the apparatus and the first device.