Amazon just started this so signup as soon as possible. They also want a backup phone number so that might be a problem for some people. You could use Google Authenticator and your own phone number or possibly your Google Voice phone number.
You can also turn your main computer into a trusted device so you don’t need the two factor authentication at home.
These are the steps.
- Your Account
- Change Account Settings
- Advanced Security Settings – Edit
- Get Started – follow the prompts.