The security apparatus used various tools for persecution of opponents of the communist regime. The most famous and the most obvious were criminal sanctions. It relied on the legal provisions of the regime at the time, mostly criminal law. In the conditions of the communist party, the law became a „front“ for executing a so-called class justice, as was in the interest and need of the regime. During the period of 1969 – 1989, 4 758 people were sentenced for crimes according to the 1st chapter of the special criminal law (crimes against the republic). However, this number does not include judgments of military courts and those sentenced for unauthorized exit from the republic (Section 109 of the Criminal Codex), which in total accounted for 105 993 people.