The Single Sign-on (SSO) add-on allows you to reuse existing HTTP-based SSO infrastructures with the JFrog Platform Unit (JPD), such as the SSO modules offered by Apache HTTPd.
You can have JPD authentication work with commonly available SSO solutions, such as native NTLM, Kerberos etc.
SSO works by letting JPD know what trusted information it should look for in the HTTP request, assuming this request has already been authenticated by the SSO infrastructure that sits in front of Artifactory.