On and off I have been hearing some cases of members' accounts got hacked and miles got stolen. I tried to look around in my Delta account and it seems there is no way to set up two-factor authentication. All it needs now is just a password to log into the account. I called into Delta call center and they said there is no two-factor authentication offered now. They said they will ask the caller additional profile questions to verify the caller. But if the hacker can hack into someone's account, the hacker can already access the answers to these profile questions. Anyone knows of any ways to increase account security?