Today, many of us work with computers, play on computers at home, go to school online, buy goods from merchants on the internet, take our laptops to the coffee shop to read emails, use our smartphones to check our bank balances, and track our exercise with sensors on our wrists. In other words, computers are ubiquitous.

Although technology allows us to access a host of information with only a click of the mouse, it also poses major security risks. If the information on the systems used by our employers or our banks becomes exposed to an attacker, the consequences could be dire indeed. We could suddenly find the contents ...

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