The weakest link in every network -- the one that makes security professionals lose sleep at night -- is the little box on the sign-in page of your users' favorite web destinations. You know, the little box that allows them to unlock access to online services and apps.

Online criminals do their best to break in to those services. If a user chooses a weak password (123456 and letmein are horrifyingly popular examples), an attacker can probably gain access with just a few guesses.

Bad guys use phishing messages to lure victims into typing their credentials into deceptive web forms that can look almost exactly like the real thing. Even if your us ...

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