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Develop an Android app that provides the functionality of an electronic witness. That is: 1-click activation of audiovisual recording with minimal latency, recording of the GPS coordinates and the time, autofocus on the largest faces in the video field of view, transfer of the recorded data to an online data space, where the content cannot be accessed by anybody but the system administrator. In return, the user receives a "ticket" with the entry and a keyframe description of the recorded data. The guarantee that the data cannot be manipulated by the user + recording of time and location would create the ideal electronical witness.