Remember this url: https://accounts.google.com/sesame . next time you want to check your gmail on a public computer, don't trust even the incognito window because an installed keylogger can record your keystrokes, which unsurprisingly, include your password. use your phone to scan the qrcode on the sesame web page and hit the resultant url -- the desktop browser will automagically redirect to your logged-in gmail without entering your password. yes, i think you do need an android phone with a properly configure google account for this to work. Read more: Google Plus +Walter Chang
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