From the BBC:
The study of thousands of websites across 120 Internet Service Providers found 25 of 41 countries surveyed showed evidence of content filtering.
Websites and services such as Skype and Google Maps were blocked, it said.
Such "state-mandated net filtering" was only being carried out in "a couple" of states in 2002, one researcher said.
"In five years we have gone from a couple of states doing state-mandated net filtering to 25," said John Palfrey, at
Mr Palfrey, executive director of the