Learn what two-factor authentication is and how Duo protects your accounts with an extra layer of security beyond your password. Access and manage your organization's applications securely with the Duo Portal. Simplify user authentication and enhance security through a centralized platform. Cisco Duo, the industry leading solution for identity security with end-to-end phishing resistance, security-first IAM, multi-factor authentication (MFA) and more. Make connecting easy with AI-powered video calls that enable collaboration and expression. Join a meeting now using the unique code at the end of your meeting link. It'll look something like this. Cisco Duo secures workforce access and defends against advanced identity threats with IAM, phishing-resistant MFA, SSO, passwordless, and device trust. The Duo Mobile app allows users to verify their identities quickly and securely, with something that’s already in their pocket. Learn more about the app. Learn how to enroll as a new Duo user and log in to Duo-protected applications and services. Introducing iPhone Duo, the first foldable iPhone. When open, it’s the thinnest iPhone with the largest display ever — 50 percent larger than iPhone 18 Pro Max. And it has an outer display with more than 90 percent of the screen area of iPhone 18 Pro. Can I perform Duo Push authentication without opening the Duo Mobile app? KB FAQ: A Duo Security Knowledge Base Article Learning with Duolingo is fun, and research shows that it works! With quick, bite-sized lessons, you’ll earn points and unlock new levels while gaining real-world communication skills.