Kinds of blocking Blocking by TLD (e.g..il,.com) Blocking specific servers Blocking specific websites (e.g. Facebook.com, youtube.com) Filtering of words and phrases in search engine (e.g. democracy, holocaust) Blocking specific cases/events (e.g. Tiananmen Square protests in China) Full block
Censorship in the world No censorship Some censorship Under surveillance Heavy surveillance ("Internet black holes")
Censorship in the world People's Republic of China More than 150 million people are in the internet Chinese government has made the most sophisticated system of censorship ever Blocking all webpages about democracy, regime change, independence of Tibet and youtube.com, facebook,com etc.
Censorship in the world Cuba – no access to the internet North Korea – no access to the internet Some Arab states – filtering some words as sex, naked and women's rights Syria – fitering servers YouTube, Facebook, Amazon and Hotmail During the Arab spring of 2011 censorship was extensive
Censorship in the Czech Republic In the Czech Republic can be a contract between provider and customer, which can reduce access to data Telefónica O2, T-Mobile and Vodafone have supported this service Mostly filtrated is child pornography, but we can´t find out, which websites are blocked
Censorship in the Czech Republic IMAGINE censorship in our state
Thank you for your attention In this presentation was: How censors block the internet? Censorship in the world Censorship in the Czech Republic