The law, the German security authorities, allows information about the owner of a telephone connection or an IP address, is unconstitutional. The Federal constitutional court ruled on Friday published a decision. The manual inventory data and information was a violation of the informational right to self-determination and the secrecy of Telecommunications of the holders of telephone and Internet connections, it means to justification. The intervention threshold is not regulated, relatively. (Az. 1 BvR 1873/13, etc.)
The telecommunications act and corresponding provisions in other laws must be no later than the end of 2021 revised. As long as the disputed provisions remain in force. The judges of the First Senate, however, make provisions for their application.
the police, the Federal criminal police office and the intelligence services use the information to solve crimes or prevent terrorist attacks. To do this, you may query, for example, in the case of telephone companies and providers of “fixed” data such as your Name, address and date of birth, but also the used IP-addresses.
The rules had to be revised after a first ruling of the Federal constitutional court of 2012 already. Now it turned out that the reformed law is sufficient to still the requirements.