Have you encountered authorization, multi-factor authentication, IDM?

Yes, in Java projects it is common to work with authorization, multi-factor authentication, and identity management systems (IDM). For example, multi-factor authentication can be implemented using Spring Security with integration of external OTP or SMS providers. IDM systems help centrally manage users and their permissions, which is important for enterprise applications.

An example of configuring two-factor authentication in Spring Security might include adding a filter to verify OTP after successful login with username and password.