Just now Joe Tidy,BBC cybersecurity correspondentand Farshad Bayan,BBC Persian NurPhoto via Getty Images Iran is 10 days into one of the most extreme internet shutdowns in history, with 92 million citizens cut off from all internet services and even disruption to phone and text messaging. The Iranian government cut off services on 8 January, apparently to stifle dissent and prevent international scrutiny of a government crack down on protesters.