Freedom of speech in cyberspace

Hi friends. I'd like to carry on the issue of freedom of speech in cyberspace.As you see these days in many countries, speech through cyberspace has proven to be another means of communication which has been regulated by the government.in recent years has been released numerous reports documenting the filtration of internet-speech in various countries. While China has thus far proven to be the most rigorous in its attempts to filter unwanted parts of the internet from its citizens ,many other countries including Singapore, Iran, Saudi Arabia, and Tunisia have engaged in similar practices. In one of the most clear examples of information-control, the Chinese government for a short time transparently forwarded requests to the Google search engine to its own, state-controlled search engines . These examples of filtration bring to light many underlying questions concerning the freedom of speech, namely, does the government have a legitimate role in limiting access to information? And if so, what forms of regulation are acceptable? The recent blocking of "blogspot" and other websites in India failed to reconcile the conflicting interests of speech and expression on the one hand and legitimate government concerns on the other hand.what idea do you have in this respect. I appreciate it if you share your idea with me.