  The paper introduces confidential computing approaches focused on protecting
hierarchical data within edge-cloud network. Edge-cloud network suggests
splitting and sharing data between the main cloud and the range of networks
near the endpoint devices. The proposed solutions allow data in this two-level
hierarchy to be protected via embedding traditional encryption at rest and in
transit while leaving the remaining security issues, such as sensitive data and
operations in use, in the scope of trusted execution environment. Hierarchical
data for each network device are linked and identified through distinct paths
between edge and main cloud using individual blockchain. Methods for data and
cryptographic key splitting between the edge and the main cloud are based on
strong authentication techniques ensuring the shared data confidentiality,
integrity and availability.
