Censorship: The suppression or prohibition of any parts of books, films, news, etc. that are considered obscene, politically unacceptable, or a threat to security. It's like when your parents don't let you watch certain movies because they think it's inappropriate for your age.
Disinformation: Deliberately misleading information announced publicly or leaked by a government or especially by an intelligence agency. It's similar to spreading rumors about someone in school to damage their reputation.
Psychological Warfare: The use of propaganda against an enemy, supported by such military, economic, or political measures as may be required. It's like playing mind games with your opponent in a chess match to throw them off their game.