Chapter 4. Passwords and Security

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“Security” used to refer solely to one’s physical safety, such as having good door locks and perhaps a home security system. But in our modern world of hacks and malware and phishing, security increasingly focuses on the important information stored on your computer and devices. You can take concrete steps to keep burglars out of your house, but if a malicious entity steals your credit card information—usually from a hacked retailer, not directly from you—your bank accounts could be drained without you even knowing about it.

Understand at the outset that we’re not going to sugarcoat security in this chapter. The ...

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