Super Gluu by Gluu is a two-factor authentication (2FA) application for iOS and Android devices that uses mobile push notifications and FIDO U2F authentication endpoints. It allows users to verify their identity with their mobile phone, providing a more secure and user-friendly alternative to one-time password (OTP) codes. Super Gluu supports both push notifications and QR codes for authentication, adding a cryptographic challenge and response to verify that the device was previously registered. It is supported by the open-source Janssen Project and Gluu Flex, making it easy to deploy. Super Gluu is free to end users on the App Store and Play Store, with businesses paying a small fee per push notification. It requires internet access for push notifications and QR code scanning. Users manage their Super Gluu devices through the Casa self-service portal, which allows viewing, adding, removing, and editing devices. Super Gluu can be integrated with applications using SAML or OpenID by specifying a certain authentication context class reference (ACR).
