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1. How does SSO work? What is SSO (Single Sign-On)? Basically, Single Sign-On (SSO) is an authentication scheme. It allows a user to log in to different systems using a single ID. The diagram below illustrates how SSO works. Step 1: A user visits Gmail, or any email service. Gmail finds the user is not logged in and so redirects them to the SSO authentication server, which also finds the user is not logged in. As a result, the user is redirected to the SSO login page, where they enter their...