The redesign of data protection in the police and judicial area is intended to create uniformity at the European level for the citizens of EU Member States. This scientific article analyses the subject of data protection in law enforcement and judicial cooperation in criminal matters. The focus is primarily on the existing provisions and the latest developments of the EU with regard to Directive (EU) 2016/680 on the protection of natural persons with regard to the processing of personal data by competent authorities for the purposes of the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, and on the free movement of such data, and repealing Council Framework Decision 2008/977/JHA. The international level with regard to data protection in the police and judicial area and possible changes due to the developments in data protection under European law are also examined in more detail.