© The Author(s), under exclusive license to APress Media, LLC , part of Springer Nature 2021
S. BoonkrongAuthentication and Access Controlhttps://doi.org/10.1007/978-1-4842-6570-3_6

6. Multi-factor Authentication

Sirapat Boonkrong1  
Nakhon Ratchasima, Thailand

Today, there are over 3.5 billion people online and have access to many online services such as banking, shopping, student records, and social media. In order to access these services, they have to carry out and pass a login or authentication mechanism, which usually requires a username and a password. In the previous chapters, we have learned a username and a password are not the only credentials that can be used during the login process.

As explained earlier, there are actually three major ...

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