Huge group chats with real-time voting let demonstrators decide what steps to take next.
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Danny Vincent
BBC Newsnight
Encryption
The tech giants are among 47 organisations to hit out at a plan to look at encrypted messages.
Read moreSwipe Right for Crime
Police across the globe have successfully infiltrated leading dark web criminal markets. The result is that the trade in illegal drugs, stolen credit cards and indecent images of children is shifting to encrypted mobile phone apps. The crooks believe their business is protected by 'uncrackable' technology. So what should Government and the telecoms companies do to ensure criminals do not exploit secure encryption? Reporter: Geoff White Producer: David Lewis Editor: Gail Champion (Photo credit: NurPhoto\Getty Images)
Tech firms say the controversial laws could weaken overall security for users of messenger apps.
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Designed by Alan Turing, the machine helped uncover how German forces had scrambled key messages.
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A court approves the media regulator's request after the app refuses to hand over encryption keys.
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Facebook stores a copy of your private messages because it doesn't use end-to-end encryption - and it's not the only one.
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The National Museum of Computing has raised £60,000 to house the wartime machine.
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