SecurEnvoy has upgraded its SMS-based system for two-factor authentication with the ability for users to receive one-time passwords via a landline telephone call and enter them using the telephone keys. The goal is to increase reliability for people who do not always have an Internet or mobile telephone connection. The need for more secure alternatives to passwords was highlighted this week as AP’s Twitter account was hacked and used to send out a fake message about an attack on the White House that had left President Barack Obama injured.”]