An anonymous reader writes: The German Interior Ministry has approved for investigative use a spying Trojan developed by the German Federal Criminal Police (a so-called "federal Trojan"). In fact, it could end up being used as early as this week. The police will have to get a court order to use the spyware, and prove that the suspect is involved in a crime threatening citizens' "life, limb or liberty". The malware has been developed in-house, and has been available since autumn 2015. It is supposed to be used only for so-called telecommunication surveillance at the source, i.e. to read emails, chats and wiretap phone calls made by the target via his or her computer or smartphone, and not to access files, steal passwords, or set up video or audio surveillance via the device.