OAuth - how applications gain access to accounts without knowing the password?

The article 'An Illustrated Guide to OAuth' provides a detailed introduction to the OAuth protocol, which is one of the most widely used authorization mechanisms in web applications today. The author outlines the fundamental principles of how this protocol operates and highlights its key features through numerous illustrations. These visual representations make understanding the architecture and processes behind OAuth significantly easier, particularly for those who are just starting their journey into the topic. The article also covers various versions of OAuth, pointing out the enhancements and changes made in subsequent iterations, as well as their impact on the security and functionality of applications. Ultimately, the text encourages readers to delve deeper into the applications of OAuth, emphasizing the necessity of understanding how to protect user data in today's world of web applications.