Police needs certain privileged access to information for investigation and to produce facts for the court. As police powers are in potential conflict with human rights and privacy, they are regulated by law. In the wake of the Internet law enforcement is challenged with new global threats and citizens are increasingly becoming aware that their privacy is threatened by surveillance and algorithmic data analysis. Ideally, law enforcement would be governed by courts and parliament to assure that their measures are appropriate and effective. This should establish the processes that citizens can go beyond a position of uninformed trust into law enforcement agencies. In practice, this is difficult and some non-state actors are trying to come up with technological solutions to assure confidence and non-observability. On the other hand police fears “to go dark”. This talk is looking into the viability of technology to improve privacy and compares the options to organizational measures.