The meaning of two-factor authentication

Simply put, two-factor authentication is an authentication system that can only work by combining what you know with what you have. For example, a bank card that withdraws money from an ATM is an example of a two-factor authentication mechanism. You need to know the combination of the withdrawal password and the bank card before you can use it.

At present, the mainstream two-factor authentication systems are all based on time synchronization, and DKEY two-factor authentication system and RSA two-factor authentication system have higher market share. Because DKEY has increased the support for SMS password authentication and SMS+token mixed authentication, DKEY two-factor authentication system is more competitive than RSA.