The much known confusion over major outage in China of Google Inc.'s search sites on Tuesday uncovered one of the major remarkable aspects of the Chinese Government's Internet censorship apparatus: It is designed to be obscure.

By Wednesday, the access to the search sites were revealed to be normal, however, searches for some terms, were prohibited.

China has one of the biggest and sophisticated Internet-filtering systems operated in the world, according to analysts who have studied it.

China generally doesn't warn its people when it is interfering with their Web access in contrasted to some other countries, such as Saudi Arabia, where a pop explanatory warning messages is received when users are denied access to some sites.

Isaac Mao, Director of the Social Brain Foundation, a Shanghai-based Internet and new media research group, cited that the Government's strategies make its users to think that it is primarily a server problem and not a problem with the Great Firewall.

Another fact pointed out is that the filtering is often controlled by government-owned Internet service providers operating on local level, so blocks are usually simultaneous or uniform, rendering it as random.