  6G will fulfill the requirements of future digital healthcare systems through
emerging decentralized computing and secure communications technologies.
Digital healthcare solutions employ numerous low-power and resource-constrained
connected things, such as the Internet of Medical Things (IoMT). However, the
current digital healthcare solutions will face two major challenges. First, the
proposed solutions are based on the traditional IoT-Cloud model that will
experience latency and reliability challenges to meet the expectations and
requirements of digital healthcare, while potentially inflicting heavy network
load. Second, the existing digital healthcare solutions will face security
challenges due to the inherent limitations of IoMT caused by the lack of
resources for proper security in those devices. Therefore, in this research, we
present a decentralized adaptive security architecture for the successful
deployment of digital healthcare. The proposed architecture leverages the
edge-cloud continuum to meet the performance, efficiency, and reliability
requirements. It can adapt the security solution at run-time to meet the
limited capacity of IoMT devices without compromising the security of critical
data. Finally, the research outlines comprehensive methodologies for validating
the proposed security architecture.
