Some websites and apps offer two-factor authentication (also known as multifactor authentication), which helps prevent other people from accessing your accounts even if they know your passwords. Passwords are the first authentication factor, and temporary, one-time verification codes are commonly a second factor. iPad can automatically generate these verification codes without your reliance on SMS messages or additional apps.
If you have another device with a screen, like a computer or iPhone, you can use it to display a QR code from a website or app, then use the iPad camera to scan the code.
On your other device, sign in to the area of the website or app where you manage your account, then select options to enable two-factor authentication and an authenticator app.
A QR code appears to help you set up an authenticator app.
On iPad, use the camera to scan the QR code.
On iPad, select your account for the website or app.
A verification code appears below the User Name and Password fields.
On your other device, enter the verification code that appears on your iPad.
If you can’t scan a QR code from another screen, you can manually enter a setup key.
Sign in to the area of the website or app where you manage your account, then select options to enable two-factor authentication and an authenticator app.
Choose the option to manually use a setup key (or setup code or similar), then > Passwords, select your account for the website or app, tap the verification code, then tap Copy Verification Code. Return to the website or app, then Automatically fill in strong passwords on iPad