updated 04:37 pm EDT, Thu March 21, 2013
Sends codes to Findy My iPhone, SMS numbers
A two-step verification process is now an option for Apple ID accounts, reports say. The option can be accessed on Apple's website, and once enabled requires entering a PIN before making an account change or a purchase on iTunes or the App Store. Codes are sent via Find My iPhone or a text message.
When getting a code on an iOS device, a lockscreen message tells users to "unlock to view your verification code." In case a device tied to an Apple ID ends up lost or stolen, a special recovery key can be used.