The cost of online anonymity
In the second report looking at privacy and the internet, Dan Simmons examines whether it is possible to be totally anonymous and asks if this is really a desirable thing.
In London's Speaker's Corner, the right to freedom of expressions has been practised by anyone who cares to turn up for centuries. But in countries where free speech is not protected by the authorities, hiding your true identity is becoming big business.
By Dan Simmons at the BBC.
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