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Online data breaches have become so routine, only the very biggest now make the news. Professor Alan Woodward, a cyber security expert at the UK's University of Surrey, tells us it's fair to assume that your personal data is being sold and traded on the dark web and he gives us some tips on how to stay safe online. Also, Jenny Afia, a partner specialising in privacy and defamation at the London law firm Schillings, explains who owns the personal data we put on the web and how much privacy we can reasonably expect. Plus, our regular commentator James Srodes in Washington warns about the rising threat of professional hackers and why governments are struggling to contain them.

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