The difficulty in using Twitter's new login verification feature will likely make it useful only to actors, politicians, and other high-profile users willing to go through the hassle for tighter security.
Twitter, like Google and Facebook, is experimenting with multi-factor authentication as a back up to the traditional user name and password that most experts agree is no longer sufficient to protect user accounts. In its latest attempt to bolster security, Twitter has focused on the mobile phone as the keeper of the crown jewels for protection.
In general, Twitter has adopted a system called asymetric cryptography in which an iOS or Android device is used to generate a private and a public key. While the former stays in the phone, the latter is stored on a Twitter server.
Together, the keys keep track of clients trying to log into a Twitter account. If someone tries to log in from a Web browser, then a notification is sent to the phone, asking the user to OK the request for entry.
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