That's not exactly correct. Another factor is something you are, such as a fingerprint or eye. There are three classes of factors from which drawing any two is called 2FA.
There is also a 1.5 factor auth, used for example by many banks, in which there is a server challenge for the very vulnerability stated in the article.
That's not exactly correct. Another factor is something you are, such as a fingerprint or eye. There are three classes of factors from which drawing any two is called 2FA.
There is also a 1.5 factor auth, used for example by many banks, in which there is a server challenge for the very vulnerability stated in the article.