Step-by-step explanation:
Empowering the police to monitor citizens at all times
The first police shortly created after the overthrow of the Tsarist regime, would be an instrument to be used in a totalitarian command
The secret police of Stalin NKVD was a force that drew later under Stalin the totalitarian policy most scandalous for carrying out Stalin's Purges.
The secret police was mostly used for securing that Stalin would stay in power indefinitely,
The alleged national security and their aims were far beyond and contributed for cruel work camps, famines and social engineering.
They wanted to create conditions for a new socialist system to born.
Stalin also used the NKVD for eliminating close people to him when he became suspicious.
Periodically he will use systematically "cleaning lists" for setting a quota of people to be killed.