PL
This paper shows the conflict between two values protected in every democratic country by constitutional law. On the one hand, the right to privacy and on the other hand the competencies of the State to ensure the security of its citizens eg. by using secret surveillance measures. Therefore, it is necessary to seek an appropriate balance between these two standards protected by law based on selected judicatures of the Constitutional Tribunal in Poland, and the regulations of the Council o f Europe and the European Union.