Explaining the concept of the single-sign-on pattern

In a business environment, it is very common that, when a user logs in to a system, they are automatically logged into various other systems within the business without having to input their login details more than once. One example of this is Google services. Here, if a user logs in to one Google application (Gmail, YouTube, Google Drive), they are logged in to all the available Google services. For example, if we log in to Gmail, we can access YouTube without having to log in again.

Single-sign-on is a security pattern that creates an authentication service that is shared with several applications of a domain to make the centered validation of authentication and authenticates a user only once in this domain. The user can then access all applications of this domain without having to authenticate again. All applications that depend on this type communicate with service authentication in order to validate the authentication of a user and...