Today, weíre announcing our newest opt-in security feature that Iíve worked to build over the past few months: Login Approvals.
Login approvals is a Two Factor Authentication system that requires you to enter a code we send to your mobile phone via text message whenever you log into Facebook from a new or unrecognized computer. Once you have entered this security code, youíll have the option to save the device to your account so that you donít see this challenge on future logins.
If we ever see a login from an unrecognized device, you'll be notified upon your next login and asked to verify the attempted account access. If you donít recognize this login, you'll be able to change your password with the knowledge that while some one else may have known your login credentials, they were unable to access your account and cause any harm.