Disclosed are systems and method for trusted presentation of information on an untrusted user device. An exemplary system includes a secure portable device which can be connected to the untrusted user device and configured to: receive data from the untrusted user device; analyze the received data to identify therein information intended for display to the user via the untrusted user device; generate a video stream containing at least part of the information intended for display to the user; generate and insert into the video stream one or more protection elements that serve to authenticate the information being outputted in the video stream; and transmit the generated video stream to the user device.