Facebook says users can now use dedicated hardware or code-generating apps for two-factor authentication, without having to register their phone number (Kate Conger/Gizmodo)

Kate Conger / Gizmodo:
Facebook says users can now use dedicated hardware or code-generating apps for two-factor authentication, without having to register their phone number  —  Facebook users who want extra account security but don’t want to share their phone number with the company can now lock down their accounts …