“German authorities believe they are on firm legal footing to retaliate against cyber attacks by unleashing digital or conventional counterattacks, according to a series of recent written responses by government officials to lawmakers. The documents shed light on some of the legal considerations of cyber-warfare mulled in Berlin, just as the Bundeswehr moves toward full operational capability of a new command devoted to cyber operations.”
Source: German cyberwarriors assert right to ‘hack back’ when attacked