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QR codes can be used to log into websites: a QR code is shown on the login page on a computer screen, and when a registered user scans it with a verified smartphone, they will automatically be logged in. Authentication is performed by the smartphone, which contacts the server. Google developed this in 2012.
Take control of your account's security and require a verification code, in addition to your password, to sign in to AOL. Account Management ยท Feb 21, 2024