Explaining the authentication mechanism

In an enterprise environment, every application or resource needs to validate the user access and guarantee that all users that access these applications or resources will be identified and validated to prevent non-authorized access. When a user requests access to a protected area, they need to be authenticated and then their permissions will be validated by the server. To allow a developer to authenticate and validate users, Java EE 8 has to have an Authentication Mechanism, which is a common solution in Java EE 8 that allows developers to authenticate and validate users in a fast and easy way. The Java EE 8 has five mechanisms to authenticate users:

• Basic authentication
• Form-based authentication
• Digest authentication
• Client authentication
• Mutual authentication 

The authentication mechanism works by identifying the roles that define user permissions. Identity is generally defined by logging in with a username and password. This information about a user...