Aerospace and defense is not an obvious home for blockchain. The sector runs on classified networks, legacy procurement systems, and multi-decade platform lifecycles. Yet the same properties that make distributed ledger technology attractive to finance and logistics—immutable records, decentralized verification, cryptographic auditability—map with unusual precision onto the hardest operational problems in A&D: parts provenance, contractor accountability, and multi-jurisdiction data sharing.

The market reflects growing institutional recognition of this fit. Defense procurement agencies and prime contractors have moved from exploratory pilots to funded programs, with blockchain embedded in supply chain management, maintenance records, and secure communications infrastructure.

IBM Food Trust, Walmart’s blockchain-based food traceability system, launched in 2018 with a demonstration that became one of the most frequently cited proof points for enterprise blockchain. A mango that had previously taken six days to trace from store shelf to farm of origin could be traced in 2.2 seconds using the blockchain system. The demonstration was real. The subsequent adoption curve was more complicated.

Supply chain traceability is the enterprise blockchain use case that generated the most serious investment and the most careful subsequent analysis. The results are instructive for anyone evaluating where distributed ledger technology creates genuine value and where it serves primarily as marketing infrastructure for complexity that simpler systems could handle.

The history of enterprise blockchain in trade finance is a useful corrective to the cycles of enthusiasm and dismissal that characterize coverage of distributed ledger technology. Neither the enthusiasts who projected that blockchain would eliminate trade finance friction within five years nor the skeptics who declared enterprise blockchain categorically pointless have been vindicated. What happened was messier, slower, and more instructive than either camp anticipated.

The high-profile failures are well documented. IBM and Maersk’s TradeLens platform — the most ambitious attempt to put global shipping documentation on a blockchain — shut down in 2022 after failing to achieve the network effects that made it valuable. We.Trade, a European trade finance platform backed by major banks, went into administration in 2022 as well. Marco Polo, another bank-backed network, faced similar difficulties.