Transshipment is the routing of goods through an intermediate country, company, or warehouse before final delivery. In trade and logistics, it can be a normal way to consolidate shipments or move items across borders. In cyber security and export-control work, however, it can also be used to hide the true destination or end user of sensitive hardware, software, or technology.
It matters because many attacks and compliance violations depend on obscuring provenance. A broker may pass restricted servers through multiple intermediaries, use misleading invoices, or file false end-user documents to bypass screening. Defenders reduce this risk with stronger vendor vetting, shipping-record checks, end-user verification, chain-of-custody logs, and anomaly detection for unusual routing. When the paper trail does not match the physical route, transshipment becomes a red flag for smuggling, sanctions evasion, or diversion of controlled compute.