XML (eXtensible Markup Language)

XML (eXtensible Markup Language) is a versatile markup language designed for encoding documents in a format that is both human-readable and machine-readable. It provides a standardized framework for defining custom markup languages, enabling the structured storage and transport of data across diverse systems. Its hierarchical, self-describing nature makes it ideal for creating data standards that ensure interoperability and data integrity. Within cybersecurity, XML's strict parsing rules and clear separation of data from presentation contribute to more predictable and secure data handling, reducing vulnerabilities associated with ambiguous data formats.

XML plays a particularly critical role in Identity and Access Management (IAM), serving as the foundation for key protocols such as Security Assertion Markup Language (SAML). SAML relies on XML-structured assertions to securely exchange authentication and authorization data between identity providers and service providers, enabling capabilities like Single Sign-On (SSO) and federated identity across enterprise boundaries. This structured approach to identity data exchange is essential for maintaining strong security postures and streamlining user access within complex digital ecosystems, making XML a cornerstone technology for secure, standardized data interchange in modern computing.