Harding's performance as CEO of a tech company has particularly come in for criticism - but how many senior execs would do better? Take our quiz to see if your security knowledge is up to scratch.
TalkTalk
Quiz: TalkTalk digital pitfalls, could you do better?
TalkTalk and its CEO Dido Harding have been attacked for allowing hackers to get the better of them for the third time this year.
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