Seafloor disposal is the placement of materials on the ocean bottom. In practice, it means intentionally abandoning containers, equipment, or waste in deep water where retrieval and inspection are difficult. The main technical issue is persistence: once material is out of sight and hard to access, it can remain hazardous or unverified for years.
In cyber security, the term is useful as a physical-data analogy. Organizations sometimes assume old media, decommissioned devices, or archived records are harmless once they are removed from daily use. But if they are not securely sanitized, tracked, and monitored, sensitive data can survive in forgotten places. Attackers also exploit this pattern by hiding tools, stash points, or evidence in remote infrastructure. Defenders reduce this risk with inventory control, chain-of-custody, media destruction, and periodic audits of assets that were “disposed of” but may still affect security.