1) Policy 
Opposition to extension or dissemination of knowledge beyond certain limits and to questioning dogmas. Obscurantism is the opposite of freethought and is often associated with religious fundamentalism by its opponents. Indeed, it is a commonly raised accusation in debates on academic freedom, with anti-communists and others associating it with the ...
Obscurantism (obscurantisme, from the Latin obscurans, `darkening`) is the practice of deliberately preventing the facts or the full details of some matter from becoming known. There are two common historical and intellectual denotations to Obscurantism: (1) deliberately restricting knowledge—opposition to the spread of knowledge, a policy of .....
policy of withholding knowledge from the public
• (n.) The system or the principles of the obscurants.
Ob·scur'ant·ism noun The system or the principles of the obscurants. C. Kingsley. 
[n] - a policy of opposition to enlightenment or the spread of knowledge 2. [n] - a deliberate act intended to make something obscure
obscurantism 1. A policy of opposition to the increase, enlightenment, or the spread of knowledge. 2. A policy of withholding information from the public. 3. A style in art and literature characterized by deliberate vagueness or obliqueness.
noun a deliberate act intended to make something obscure