The protection of non-combatants in times of autonomous warfare raises the question of the timeliness of the international protective emblem. (Fully) Autonomous weapon systems are often launched from a great distance, and there may be no possibility for the operators to notice protective emblems at the point of impact; therefore, such weapon systems will need to have a way to detect protective emblems and react accordingly. In this regard, the present contribution suggests a cross-frequency protective emblem. Technical deployment is considered, as well as interpretation by methods of machine learning. Approaches are explored as to how software can recognize protective emblems under the influence of various boundary conditions. Since a new protective emblem could also be misused, methods of distribution are considered, including encryption and authentication of the received signal. Finally, ethical aspects are examined.
