In the wake of an extremely high-profile leak of celebrity selfies from compromised iCloud accounts, Apple has added two-factor authentication to its cloud storage service. The enhanced security feature checks in with a user via their phone when suspicious account activity is detected (such as a login from an unfamiliar device), allowing them to shut down anyone attempting to gain unauthorized access. It's likely cold comfort for the dozens of actresses and celebrities, among them Jennifer Lawrence, whose very private photos were posted online two weeks ago; two-factor authentication could easily have have prevented it from happening, which is why Web apps like Twitter and Gmail implemented it years ago.
Considering the numerous hacks of retailers and websites that have occurred this year, it is strongly recommended that you enable two-factor authentication on your cloud service or move to one that features it. iCloud users: Log in to your Apple ID account and click on "Password and Security," then "Two-step verification" to set it up — you'll need a phone capable of receiving text messages.
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