An open security data format is a standardised way to represent and move telemetry without locking it to one vendor’s ingestion model. It helps teams reuse data across tools, preserve interoperability, and reduce the operational friction caused by proprietary parsing and storage layers.
Expanded Definition
An open security data format is not just a file type or transport wrapper. It is a common structure for encoding security telemetry, such as alerts, events, logs, and metadata, so that multiple tools can ingest, normalise, and exchange the data with less custom parsing. The emphasis is on portability and interoperability, especially where security operations teams need to move data between SIEM, SOAR, XDR, and data lake workflows without rebuilding pipelines each time.
Definitions vary across vendors because some products describe their own export schemas as “open” even when the format still depends on proprietary fields or ingestion rules. For NHI Management Group, the practical test is whether the data can be interpreted consistently outside the originating platform and whether the schema is documented enough for independent implementation. That makes this concept closely related to security governance goals in the NIST Cybersecurity Framework 2.0, which stresses repeatable, risk-informed security operations.
The most common misapplication is calling a vendor-specific export “open” when the structure still requires proprietary connectors or hidden field mappings to be useful.
Examples and Use Cases
Implementing an open security data format rigorously often introduces schema governance overhead, requiring organisations to balance interoperability gains against the cost of version control, validation, and downstream field mapping.
- A SOC exports endpoint telemetry into a shared format so analysts can correlate detections in one SIEM and later reprocess the same records in a different analytics platform.
- A cloud security team normalises alert data before forwarding it into a central data lake, reducing dependence on one vendor’s parsing logic and making retention policies easier to apply.
- An incident response team preserves raw security events in an open format to support chain-of-custody review, forensic replay, and independent validation after a breach.
- A platform engineering group standardises event fields across identity, network, and workload sources so that automation in SOAR can trigger consistent workflows.
- A tool buyer uses an openly documented schema to test whether a product can exchange data cleanly with existing controls rather than creating another isolated telemetry island.
For teams building around standardised observability and security pipelines, the idea is closely aligned with the broader interoperability direction seen in the NIST Cybersecurity Framework 2.0, where repeatable data handling supports better detection and response.
Why It Matters for Security Teams
Security teams lose flexibility when telemetry is trapped in proprietary formats, because detection logic, retention workflows, and incident investigations become tied to one product’s ingestion model. That creates switching costs, slows correlation across domains, and can weaken evidence quality when teams need to reconstruct events across multiple tools. Open security data formats help reduce those constraints by making telemetry easier to validate, move, and share across trust boundaries.
This matters especially where identity and machine activity overlap. NHI logs, service account actions, API authentication events, and agentic AI tool-use traces are only as useful as their readability across systems. If the format obscures source, time, identity context, or action semantics, security teams can miss privilege abuse or misattribute automated behaviour. Open formats do not remove the need for strong governance, but they make it easier to apply consistent controls, analytics, and retention rules across environments. The concept also supports resilience objectives reflected in the NIST Cybersecurity Framework 2.0, especially where continuity of detection and response depends on reusable telemetry.
Organisations typically encounter the operational cost of closed telemetry only after a tool migration, integration failure, or incident review, at which point open security data format becomes operationally unavoidable to address.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST CSF 2.0 and NIST SP 800-53 Rev 5 set the technical controls, while ISO/IEC 27001:2022 define the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.SC-01 | NIST CSF 2.0 addresses governed, repeatable security practices that benefit from interoperable telemetry. |
| NIST SP 800-53 Rev 5 | AU-3 | Audit record content requires sufficient detail to support review, correlation, and accountability. |
| ISO/IEC 27001:2022 | A.8.15 | Logging and monitoring controls depend on reliable, accessible security event data. |
Treat telemetry formats as governance assets and standardise them to support consistent detection and response.
Related resources from NHI Mgmt Group
- How should security teams control access to sensitive data in open shares?
- How should security teams reduce open access risk in data governance programmes?
- Why do open-source AI environments create a data-governance challenge for security teams?
- How should security teams unify identity across cloud and data center environments?
