More and more vendors are taking what they classically sold as an on premise solution and delivering their applications via the cloud. While this makes a lot of sense both for the vendors as well as their customers, it does introduce a problem with authenticating users. With the on premise solutions, they likely used Windows Integrated authentication for web applications to seamlessly log the customer’s users into their web application or they simply authenticated using the customers on premise Active Directory. ...
A security system that requires more than one method of authentication from independent categories of credentials to verify the user's identity for a login or other transaction.