Two-factor authentication is not an option anymore — it’s a vital tool for online security

I experimented with two-factor authentication last year. It drove me bonkers. I couldn’t turn it off fast enough. Then I, like many, read this week of Wired magazine writer Mat Honan’s recent nightmare, dealing with a cascade of compromised accounts from Amazon to iCloud to Gmail, all in a successful play for his desirable three-character Twitter handle.