Keresztdomain

Keresztdomain is a concept in information technology that describes the coordination of systems, data, and services across multiple domain boundaries. In practice, it covers cross-domain data integration, cross-domain identity and access management, and cross-domain service orchestration. The goal is interoperability and controlled collaboration while preserving security, governance, and policy compliance.

The term blends Hungarian terminology with the common IT concept of a domain, and is used primarily in Hungarian-language documentation and multilingual IT contexts. It is not a formal technical standard, but a descriptive label for cross-domain interoperability challenges and solutions.

Common applications include federated authentication across business units, data sharing between subsidiaries, and cloud or microservice architectures that span separate administrative domains. Keresztdomain approaches emphasize data mapping, policy alignment, and trusted token-based identity to enable seamless user experiences and secure data flows.

Technically, implementations rely on identity standards such as OAuth 2.0, OpenID Connect, and SAML; token technologies like JWT; and cross-domain policies enforced through access control, encryption, and auditing. Browser contexts may use CORS to permit cross-origin requests, while backend services coordinate through service meshes or API gateways.

Challenges include security risks from misconfiguration, differences in governance across domains, regulatory constraints, data sovereignty, and latency. Effective keresztdomain practice requires clear ownership, standardized schemas, versioning, and robust monitoring to balance openness with control.