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How robust is your cybersecurity? Hacking has been "industrialised" with criminals even selling hacking kits to allow attacks on computer systems. So how can business protect itself from cyber attacks and what is the real size of the threat? Jamie Robertson and expert guests: Guy Bunker from Clearswift; "white hat hacker" John Yeo and Kenneth Cukier, co-author of "Big Data" unravel the issues. And Colm O Regan looks at the dangers of sharing - both on and off-line