Twitter announced they’ve added two-factor authentication in order to help better secure Twitter.
Recently, there has been a large increase in the number of high-profile Twitter accounts being hacked into. Such examples include the AP Twitter account, MTV Twitter account and many more. Many are due to insecure passwords; thus, Twitter has added the option for users to add an extra level of sign in security through two-factor authentication.
Login to your account and go to your account settings page. Go to the “Account security” section and click on “Require a verification code when I sign in.” Then, go through the screens to set it up. Twitter will subsequently email you a code each time you login to Twitter. If you don’t see it, try logging out and logging back in.
Below is a video from Twitter on how it works: