Open web standards are shared technical rules that let different systems work together in a predictable way. They are usually published for broad use, so vendors, platforms, and security tools can implement the same methods for identity, messages, URLs, certificates, or authentication without relying on a private format.
In cyber security, open standards matter because interoperability is only useful when verification is consistent. Defenders use standards to validate who sent a request, whether a connection is encrypted, and whether a machine or service is presenting trusted identifiers. Attackers, meanwhile, often exploit environments where there is no common standard, or where implementations differ enough to cause confusion, spoofing, or weak checks. For AI agents and other automated systems, open standards can make it easier to confirm legitimacy and reduce the risk of lookalike services or untrusted connections.