A "Golden Age for Surveillance"

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Phil Zimmermann, the creator of PGP email encryption software tells us we live in a golden age of surveillance for police and spies. Justin Parfitt of HeyLetsApp says online reviews would be much more useful if negative comments were banned. Advocates of "Net Neutrality" score a victory. And Melanie Sevcenko reports on a voice-controlled format for electronic books. Presented by Rory Cellan-Jones, with special guest Ian Maude from Enders Analysis, and Fiona Graham and Dave Lee from the BBC Online technology team.