Security Token Service

A Security Token Service (STS) is a system that issues security tokens, which are digital credentials used to authenticate users and grant them access to resources or services. When you log in to a website or application, the STS verifies your identity and then creates a token, essentially a virtual key, that represents your rights. This token can be used securely across different systems without needing to share sensitive information like passwords. It enhances security by allowing users to authenticate once and access various services without having to log in each time.