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Advancement in artificial intelligence (AI) and machine learning (ML),dynamic data driven application systems (DDDAS), and hierarchicalcloud-fog-edge computing paradigm provide opportunities for enhancingmulti-domain systems performance. As one example that represents multi-domainscenario, a "fly-by-feel" system utilizes DDDAS framework to support autonomousoperations and improve maneuverability, safety and fuel efficiency. The DDDAS"fly-by-feel" avionics system can enhance multi-domain coordination to supportdomain specific operations. However, conventional enabling technologies rely ona centralized manner for data aggregation, sharing and security policyenforcement, and it incurs critical issues related to bottleneck ofperformance, data provenance and consistency. Inspired by the containerizedmicroservices and blockchain technology, this paper introduces BLEM, a hybridBLockchain-Enabled secure Microservices fabric to support decentralized, secureand efficient data fusion and multi-domain operations for avionics systems.Leveraging the fine-granularity and loose-coupling features of themicroservices architecture, multidomain operations and security functionalitiesare decoupled into multiple containerized microservices. A hybrid blockchainfabric based on two-level committee consensus protocols is proposed to enabledecentralized security architecture and support immutability, auditability andtraceability for data provenience in existing multi-domain avionics system. Ourevaluation results show the feasibility of the proposed BLEM mechanism tosupport decentralized security service and guarantee immutability, auditabilityand traceability for data provenience across domain boundaries.

Hybrid Blockchain-Enabled Secure Microservices Fabric for Decentralized Multi-Domain Avionics Systems