Phone number as an authentication method is under attack


In case you have not seen the root cause, Jack Dorsey's "hacked" Twitter posts were generated through Tweets appearing to come from his phone number: Forbes: Twitter Blames Mobile Provider 'Oversight' For Hack On Jack Dorsey's Account.

Use of phone number as a vector attack is on the rise. In case you have not read about it, SIM jacking has been a threat recently. You can find interesting tips to protect against such threat and react in case your have been hijacked here: The SIM Swapping Bible: What To Do When SIM-Swapping Happens To You.