This is not limited to authoritarian regimes only; Disinformation is just one aspect of Propaganda and is equally effective (in the negative sense) in the so-called "free" democratic countries too.
Everything is Propaganda in today's World; just the form of it varies with the ideology i.e. Democracy/Dictatorship/Socialism/Communism.
See Propaganda: The Formation of Men's Attitudes by Jacques Ellul - https://en.wikipedia.org/wiki/Propaganda:_The_Formation_of_M...
Excerpts:
The aim of modern propaganda is no longer to modify ideas, but to provoke action. It is no longer to change adherence to a doctrine, but to make the individual cling irrationally to a process of action.
"Differences in political regimes matter little; differences in social levels are more important; and most important is national self-awareness. Propaganda is a good deal less the political weapon of a regime (it is that also) than the effect of a technological society that embraces the entire man and tends to be a completely integrated society. Propaganda stops man from feeling that things in society are oppressive and persuades him to submit with good grace."
Propaganda employs encirclement on the individual by trying to surround man by all possible routes, in the realm of feelings as well as ideas, by playing on his will or his needs through his conscious and his unconscious, and by assailing him in both his private and his public life.
Propaganda must be total in that utilizes all forms of media to draw the individual into the net of propaganda. Propaganda is designed to be continuous within the individual's life by filling the citizen's entire day. It is based on slow constant impregnation that functions over a long period of time exceeding the individual's capacities for attention or adaptation and thus his capabilities of resistance.
Propaganda should no longer be viewed in terms of an orthodoxy but rather modern propaganda should be seen as an orthopraxy because it aims for participation not adherence. Participation can be active or passive: active if propaganda has been able to mobilize the individual for action; passive if the individual does not act directly but psychologically supports that action.
Propaganda is concerned with timeliness since an individual is only moved to action if he is pushed towards a timely one by propaganda. Once it becomes history it inevitably becomes neutral and indifferent to the individual who is sensitive primarily to current news. "Operational words" are used to penetrate an individual's indifference. However they lose their value as immediacy passes as old facts are replaced by new ones. The "current events man" is carried along the current of news and caught in the events of today, losing interest in the events of yesterday. The indifferent are apolitical and without opinion, therefore they are outside of propaganda's grasp. Incidentally, there are also the undecided, people whose opinions are vague, who form the majority of citizens within the collective. These citizens are the most susceptible to control of public opinion that is dictated by propaganda. Lastly, this part discusses propaganda and truth or the ability of propaganda to relay something as true based not on the accuracy of facts but of reality. Propaganda veils the truth with falsehoods even though lying is generally to be avoided.
Political vs. Sociological Propaganda:
Political Propaganda involves techniques of influence employed by a government, a party, an administration, or a pressure group with the intention of changing the behavior of the public. The themes and objectives of this type of propaganda are of a political nature. The goals are determined by the government, party, administration, or pressure group. The methods of political propaganda are calculated in a precise manner and its main criterion is to disseminate an ideology for the very purpose of making various political acts acceptable to the people. There are two forms of political propaganda, tactical and strategic. Tactical political propaganda seeks to obtain immediate results within a given framework. Strategic political propaganda is not concerned with speed but rather it establishes the general line, the array of arguments, and the staging of campaigns.
Sociological propaganda is a phenomenon where a society seeks to integrate the maximum number of individuals into itself by unifying its members' behavior according to a pattern, spreading its style of life abroad, and thus imposing itself on other groups. Essentially sociological propaganda aims to increase conformity with the environment that is of a collective nature by developing compliance with or defense of the established order through long term penetration and progressive adaptation by using all social currents. The propaganda element is the way of life with which the individual is permeated and then the individual begins to express it in film, writing, or art without realizing it. This involuntary behavior creates an expansion of society through advertising, the movies, education, and magazines. "The entire group, consciously or not, expresses itself in this fashion; and to indicate, secondly that its influence aims much more at an entire style of life." This type of propaganda is not deliberate but springs up spontaneously or unwittingly within a culture or nation. This propaganda reinforces the individual's way of life and represents this way of life as best. Sociological propaganda creates an indisputable criterion for the individual to make judgments of good and evil according to the order of the individual's way of life. Sociological propaganda does not result in action, however, it can prepare the ground for direct propaganda. From then on, the individual in the clutches of such sociological propaganda believes that those who live this way are on the side of the angels, and those who don't are bad.
"For propaganda to be effective the propagandee must have a certain store of ideas and a number of conditioned reflexes that can only be acquired through peace of mind springing from relative security. The establishment of a mode of common life—all this leads to the creation of a type of normal man conveniently leads all men toward that norm via a multitude of paths. Propaganda's intent is to integrate people into the normal pattern prevailing in society bring about conformance to way of life. To sum up: The creation of normalcy in our society can take one of two shapes. It can be the result of scientific, psycho-sociological analysis based on statistics—that is the American type of normalcy. It can be ideological and doctrinaire—that is the Communist type. But the results are identical: such normalcy necessarily gives rise to propaganda that can reduce the individual to the pattern most useful to society.
Information is indistinguishable from propaganda in that information is an essential element of propaganda because for propaganda to succeed it must have reference to political or economic reality. Propaganda grafts itself onto an already existing reality through "informed opinion".
Citizens are aware that political decisions affect everybody and governments cannot govern without the support, presence, pressure, or knowledge of the people. Yet the people are incapable of making long term policy so opinion must be created to follow the government because the government cannot be led by opinion. All of this describes the "Mass-Government" relationship characterized by people demanding what has already been decided, in order to appear as though the government is actually caring about what the people need.
An ideology provides society certain beliefs and no social group can exist without the foundation of these beliefs. Propaganda is the means by which an ideology can expand without force. An ideology is either fortified within a group or expanded beyond the borders of a group through propaganda. However, propaganda is less and less concerned with spreading the ideology nowadays as it is with becoming autonomous. The ideology is no longer the decisive factor of propaganda that must be obeyed by the propagandist. The propagandist cannot be constrained by the ideology of his State but must operate in service of the state and be able to manipulate the ideology as if it were an object. The ideology merely provides the content for the propagandist to build off since he is limited to what already is present within the group, nation, or society. The fundamental ideologies are nationalism, socialism, communism, and democracy.
Propaganda and Democracy:
Since democracy depends on public opinion, it is clear that propaganda must be involved. The relationship between democracy and propaganda evidently presents a conflict between the principles of democracy and the processes of propaganda. The individual is viewed as the cornerstone of a democracy which is a form of government that is made "for the people and by the people". However, as discussed in early chapters Ellul described the masses are incapable of making long-term foreign policy and the government needs to make these decisions in a timely manner. This is where propaganda comes into play and projects an artificial reality to the masses to satisfy their need to participate in government while the decisions are really made behind the scenes. This was also describe earlier as the "mass-government" relationship. Democratic regimes develop propaganda in line with its myths and prejudices. Propaganda stresses the superiority of a democratic society while intensifying the prejudices between democratic and oppressive.