State Secret:

§ 93 Strafgesetzbuch (= German Criminal Code)

(1) State secrets are facts, objects or knowledge which are only accessible to a limited number of people and which must be kept secret from a foreign power in order to prevent the risk of serious detriment to the external security of the Federal Republic of Germany.

(2) Facts which violate the free democratic basic order or which violate international arms control agreements when kept secret from the treaty partners of the Federal Republic of Germany are not state secrets.