DAG identifies who can access data, DSPM identifies where sensitive data lives and how it is exposed, and IGA governs whether the underlying identity entitlements should exist. They overlap, but they answer different control questions. Teams need all three if they want both exposure visibility and lifecycle accountability.
What DAG, DSPM, and IGA each answer
DAG, DSPM, and IGA sit next to one another in IAM conversations, but they answer different operational questions. DAG is about who can reach data. DSPM is about where sensitive data sits and how exposed it is. IGA is about whether the entitlements behind that access should exist, remain in force, or be removed.
The practical difference is that DAG and DSPM are exposure-oriented views, while IGA is a governance and lifecycle control. DAG tells you which identities are connected to a data set. DSPM tells you whether the data itself is discoverable, sensitive, misclassified, or overly exposed. IGA asks whether the entitlement model is still justified by role, policy, and business need.
For IAM teams, that means the three tools should not be treated as substitutes. IAM and IGA Basics is useful here because it frames the entitlement side correctly: access can be technically present without being appropriately governed, and governance can be sound even when visibility into data exposure is still weak.
How the control questions differ in practice
Use DAG when the question is “who can access this data, through which identities, groups, or paths?” That is a visibility problem, often aimed at effective access and blast-radius reduction. It is especially useful when you need to understand inherited access, nested groups, service access, or cross-domain access paths that are not obvious from the data platform itself.
Use DSPM when the question is “where is the sensitive data, how is it classified, and what exposures exist around it?” DSPM is centered on discovery, classification, posture, and exposure of the data asset. It can tell you that a store contains regulated, confidential, or high-value data, but it does not by itself decide whether a given entitlement should be removed.
Use IGA when the question is “should this entitlement exist at all, who approved it, and when should it be reviewed or revoked?” IGA is the lifecycle control plane for entitlements. It supports request, approval, certification, recertification, SoD, and deprovisioning decisions, which is why it is the right control when the issue is entitlement validity rather than data location or data exposure.
That division is why access review, data discovery, and entitlement governance often surface different findings on the same environment. A team may find exposed sensitive data in DSPM, discover broad access in DAG, and then use IGA to remove the entitlement or redesign the role model that created it in the first place.
Why IAM teams usually need all three
IAM teams usually need all three because each one closes a different control gap. Without DAG, you can miss who actually reaches a sensitive store. Without DSPM, you can miss where the sensitive stores are or how bad the exposure really is. Without IGA, you can see the problem but lack a durable governance mechanism to stop the entitlement from reappearing.
The overlap is useful, but it is not the same thing. A data exposure finding may point to an access path. An access path may point to an entitlement problem. An entitlement problem may require role redesign, access review, or deprovisioning. The most mature programs treat the three as a pipeline: discover sensitive data, map who can reach it, then govern whether that access is justified.
Access Reviews and Certification Guide aligns well with that lifecycle view, because the review process only works when the team already knows what access should be challenged and what evidence is needed to support removal.
CSA Cloud Controls Matrix is a useful external reference because it reinforces that IAM, audit, and data control belong together in a broader security control set, not as separate silos.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
CSA Cloud Controls Matrix and NIST SP 800-53 Rev 5 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CSA Cloud Controls Matrix | IAM — Identity & Access Management | IAM governs access paths and entitlement control across cloud and data estates. |
| Recommendation — Map DAG findings to IAM controls and remove unjustified access paths. | ||
| NIST SP 800-53 Rev 5 | AC-6 — Least Privilege | IGA decisions should constrain access to only what is justified. |
| AU-2 — Event Logging | DAG and DSPM depend on logging and telemetry to show who accessed data and how. | |
| Recommendation — Apply AC-6 to reduce excess entitlements uncovered by IGA review. Log data access events so DAG and DSPM findings can be validated. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | Access control policy underpins who can reach sensitive data and why. |
| A.5.18 — Access rights | IGA manages review and removal of access rights over time. | |
| Recommendation — Define and enforce access control rules for sensitive data access. Review access rights regularly and revoke rights that are no longer justified. | ||
Practitioner Guidance
What to prioritise: Start with the question you need to answer first. If the concern is unknown data exposure, lead with DSPM. If the concern is unexpected access paths, lead with DAG. If the concern is entitlement sprawl or stale approvals, lead with IGA.
What to verify: Make sure each tool is producing a distinct decision, not the same finding in different language. If DAG and DSPM both report “sensitive data is exposed,” check whether one is really telling you where the data lives and the other is telling you who can reach it.
Common mistake: Treating DSPM findings as if they automatically justify entitlement removal. That shortcut misses the governance step, because entitlement removal, role change, and approval revocation are IGA actions, not data discovery outcomes.
Practitioner takeaway: The strongest operating model is not “pick the best of the three”, it is “use each for the decision it owns,” then connect the findings so exposure, access, and entitlement governance converge on the same remediation path.
Related resources from NHI Mgmt Group
- What is the difference between human IAM controls and NHI governance?
- What is the difference between IAM and IGA when teams are accountable for compliance?
- What is the difference between attack surface management and NHI governance?
- What is the difference between reviewing human access and reviewing NHIs?