An open standard is a shared technical specification that multiple vendors or projects can implement, usually with published rules and broad access to the format or protocol. The goal is interoperability: different systems can exchange data, authenticate users, or coordinate actions without relying on one proprietary design.
In cyber security, open standards matter because defenders need tools that work together across identities, logs, agents, networks, and cloud services. Standards can improve visibility, make audits easier, and reduce vendor lock-in. They also appear in attacks and defenses through protocols such as authentication, encryption, and security telemetry: if a standard is weak, every compatible system may inherit the same flaw; if it is strong, security controls can be adopted consistently. An open standard improves compatibility, but it does not guarantee safe implementation.