It's an effective way to keep out hackers. You immediately get a text message with a six-digit number. Lots of email and social media services offer an extra later of protection: two-step authentication - essentially a second, temporary password.įor example, when you set this up with Google, ( GOOG) Twitter ( TWTR) and LinkedIn, ( LNKD) they ask you for a secret code every time you log in from a new device. Nowadays, a single password isn't enough. So, turn on Wi-Fi and Bluetooth when you need them.
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