This lecture covers the introduction of new Identity Providers (IDP) at EPFL, focusing on the challenges faced with the existing systems, the complexity, and the need for technological debt reduction. The presentation discusses the principles applied, such as user autonomy in managing accounts and passwords, the transition from Tequila to OAuth2 and OpenID Connect for Web SSO, and the implementation of multi-factor authentication. The lecture also addresses the importance of data synchronization, fraud detection, and advanced MFA techniques. The IDP project involves various EPFL teams and aims to streamline authentication processes and enhance security measures.