Twenty-five years after the World Wide Web was created, the issue of surveillance has become the greatest controversy of its existence. With many concerned that governments and corporations can monitor people's every move, this programme meets hackers and scientists who are using technology to fight back, as well as the law enforcement officers who believe it's leading to opportunities for risk-free crimes.
With contributors including World Wide Web inventor Tim Berners-Lee and WikiLeaks co-founder Julian Assange.