Said in another way, the browser will not send a cookie with the secure flag set over an unencrypted HTTP request. By setting the secure flag, the browser will prevent the transmission of a cookie over an unencrypted channel.
A cold war or cold warfare is a state of conflict between nations that does not involve direct military action but is pursued primarily through economic and political actions, propaganda, acts of espionage or proxy wars waged by surrogates.
Basically, the Cold War was a rivalry between the United States as leader of the western democracies, and the Soviet Union and the nations that were controlled by the communists. Some causes of the Cold War included: Attempts by the Soviets and Chinese Communists to influence and take over areas in Asia and Europe.