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It’s normally in the final seconds of a TV or radio interview that security experts get asked for advice for the general public – something simple, unambiguous, and universally applicable. It’s a fair question, and what the public want. But simple answers are usually wrong, and can do more harm than good.
For example, take the UK government’s Cyber Aware scheme to educate the public in cybersecurity. It recommends individuals choose long and complex passwords made out of three words. The problem with this advice is that the resulting passwords are hard to remember, especially as people have
