Authentication & Authorization: OAuth Authentication vs AuthorizationLearn the difference between authentication and authorization and some best practices in developing a login system.Creating Google Sign in Investigate OAuth and build third-party sign-in into your web applications using Google's authentication services.Local Permission SystemUse a local permission system to protect pages based on each user, not just whether that user is logged in.Adding Facebook and other providersDiscover additional OAuth providers and add Facebook authentication in your application, giving more choices for third-party auth.CompanyAbout Us Why Udacity? Blog In the News Jobs at Udacity Become a Mentor Partner with Udacity ResourcesCatalog Career Outcomes Help and FAQ Scholarships Resource Center Udacity SchoolsSchool of Animation and Game Development School of Artificial Intelligence School of Autonomous Systems School of Business Career Resources School of Cloud Computing School of Cybersecurity School of Data Science School of DevOps School of Executive Leadership School of Product Management School of Programming and Development Featured ProgramsBusiness Analytics SQL AWS Cloud Architect Data Analyst Intro to Programming Digital Marketing Self Driving Car Engineer Only at UdacityArtificial Intelligence Deep Learning Digital Marketing Flying Car and Autonomous Flight Engineer Intro to Self-Driving Cars Machine Learning Engineer Robotics Software Engineer