CAS
CAS (Central Authentication Service)
Introduction
The CAS protocol is a simple and powerful ticket-based protocol. It involves one or many clients and one server. Clients are embedded in CASified applications (called “CAS services”) whereas the CAS server is a standalone component.
The Cas protocol makes it possible to implement the SSO authentication method that allows users to access web applications with a single sign-on.
The specification versions recognized are 3.0.3 and 2.0
https://apereo.github.io/cas/6.5.x/protocol/CAS-Protocol.html
CAS architecture
Introduction
The CAS is a Single Sign On protocol for the web. This protocol allows users to access multiple applications by providing their credentials.
The response will be a JSON or XML
Single Log-in
The single log-in is usually initiated by the application server. The typical UML use case is as follows:
Proxy web flow diagram
https://en.wikipedia.org/wiki/Central_Authentication_Service
