Microsoft SharePoint 2013 makes it easy for people to work together. SharePoint 2013
enables you and your employees to set up web sites to share information with others, manage documents from start to finish, and publish reports to help everyone make informed decisions. Authentication in SharePoint 2013 defines how users, apps, and servers
obtain authenticated access to protected SharePoint resources.
If you are new to authentication in SharePoint 2013, this topic can help you identify what you need to learn to develop expertise about
authentication methods for SharePoint 2013. It includes prerequisite topics that cover a variety of web infrastructure fundamentals. You must understand the prerequisite technologies first, because SharePoint 2013 builds upon them and assumes an understanding
of them. Afterwards, you can begin learning about authentication in SharePoint 2013 with the resources in the Level 100 (introductory), 200 (intermediate), and 300 (advanced) sections.
We recommend that you read the topics in the order listed.
Table of Contents PrerequisitesLevel 100Level 200Level 300Ongoing LearningAdditional Resources
This section contains links to a variety of resources that contain the background information you need to fully understand the different
authentication methods that SharePoint 2013 supports.
The following resources contain introductory information about authentication in SharePoint 2013.
The following resources contain intermediate information about authentication in SharePoint 2013.
The following resources contain advanced information about authentication in SharePoint.
SharePoint product web page
SharePoint 2013 Portal
great overview, thanks !!