Technological concentration is the buildup of control over platforms, data, cloud services, identity systems, or infrastructure in the hands of a few dominant actors. In practice, it means many organizations rely on the same vendors, the same APIs, and the same hosted services for core operations. That creates dependency, lock-in, and a small number of high-value targets.
In cyber security, concentration matters because it turns one compromise, outage, or policy change into a broad systemic event. Attackers benefit when a single provider can expose many downstream customers through stolen credentials, a software supply-chain flaw, or abuse of administrative access. Defenders respond by reducing single points of failure: segmenting critical services, keeping independent backups, using multiple providers where practical, demanding audit logs and recovery options, and planning for service exit. The security question is not only whether a system works, but who controls it and how easily that control can be abused.