Abstract
The study deals with so called active measures and „influence politics“ of Czechoslovak State Security in the period of crises after the occupation of Czechoslovakia by the armies of Warsaw Treaty in August 1968 and during the beginning of „normalization“ in 1969-1971.The study analyses a specific kind of intelligence operations of Czechoslovak State Security, which should have influenced the enemies, broaden disinformation between them and help to enforce proper political influence of the State Security. From 1968 to 1971 such operations became an important instrument of the political struggle.