One way to get your account from any service potentially invaded by unauthorized persons is to put your login and password on an insecure network or in public places such as Internet cafes or airports. Few people know, however, that the Gmail offers a great alternative to having to enter the password on the computer to log in . Just use a smartphone with support for reading QR-codes .
Update on 17/01: The tooltip no longer works. The Google turned what was apparently only a test.
The tip is PC World staff, who found only three references to this shortcut on the web but no official Google itself, announcing that it exists. So it’s not exactly known tip. This tip, by the way, works with both Android as iOS devices, and other devices with QR-codes readers as well, since it only needs a browser.
1 – Open the page https://accounts.google.com/sesame on the computer where you want to log in to your Gmail. It will display a screen with a QR-code. Do not close this screen, this is where your Gmail opens.
2 – On your phone, open the QR-codes reading application and read the code on the screen. It will redirect you to a site where you must log in. At that point, log into your account as you normally would. If you have already saved your login and password in the browser, better yet, the page will only ask if you want to start with Gmail or iGoogle.
3 – After choosing one of the two, the page with the QR-code will be updated and will show Gmail or iGoogle, depending on what you chose earlier.
It is important to note two things: in step 2, use the 3G network to log in to your Google account is recommended. If you are using the same WiFi connection to the computer where the account is accessed, for example, this means breaking the purpose of the whole operation, as your information may be captured in the same way. In the case of 3G network, these chances decrease dramatically.
The second thing: after a while, the page with the QR-code is automatically expired, as a security measure.