Shibboleth

Shibboleth is a way of making sure that only certain people can enter certain websites or use certain services. It works by asking people to provide certain information, such as a username and password, that prove that they are allowed to be there. This information is like a password that only the right people will know, so it prevents anyone else from getting in. It's like a secret password that makes sure that only the right people can get into the website or service.