If you don’t want to leave your trace on others’ computers, use QR Codes to log in instead of entering email and password. Google now enables users to access their account with QR Codes.
Do you sometimes worry that your Google account may be compromised when you log in via a public terminal, a client’s network or an unfamiliar PC? After all there is a plethora of keylogging software available and someone must be putting it to use. Google is now using QR Codes to enable users to access their account securely using their smartphone and without entering their email and password.
This method assumes that you are logged into your Google account on your smartphone. When confronted with an unfamiliar terminal you go tohttps://accounts.google.com/sesame which will show a unique QR Code. Scan the code with your smartphone and it will resolve to a screen with your account name, a warning notice and the option to proceed to Gmail or iGoogle (image left). Tap either and the QR Code displayed on the terminal will be replaced as if by magic with your accounts Gmail or iGoogle page.