Although transparent authentication is considered an effective solution to provide convenient and efficient user authentication, reducing the dependence on human behavior, its limitation to a single device creates scalability problems. For a user with multiple devices, creating a biometric profile on each device is cumbersome, especially when various devices have limited and/or different biometric sensors. Alternatively, a federated authentication mechanism could provide a centralized entity that can keep a user’s biometric profile, configurations, preferences, and management aspects and make it applicable to authenticate the user on various devices. One of the potential solutions is a federated continuous authentication in the cloud including central managed service provider (MASP). It has agents on the differing users’ devices enabling access to various services flexibly in a service, platform, and location-independent fashion. This paper presents a federated authentication model using Cloud Aura, integrated with blockchain technology, to enhance the security and accessibility of healthcare records. The cloud-based model allows for the centralized storage and management of biometric profiles, while the blockchain ensures the immutability and security of medical records. This combined approach provides a new opportunity to achieve seamless, convenient, and secure authentication independent of the used technology and/or service. The results of the experimental study show that the Cloud Aura (CA) model, enhanced with blockchain, achieved better average integrity scores by an average of 0.39 as compared to its predecessors. Based on the analyzed results, expanded attributes of CA are identified for further architectural design and prototypical development, particularly in the context of secure and scalable healthcare data management.