Weapons of Mass Surveillance

The digital age has heralded a new unprecedented means of surveillance, and as more of our personal information goes online, more of our lives are subject to state-sponsored espionage. Governments with dubious human rights records are now using mass surveillance technology to thoroughly track and quell any murmurs of dissent - and it is western companies that are providing the technology to do so. BBC reporter Nawal al-Maghafi investigates.