An identity profile is the confidence level produced by combining the results of multiple identity checking steps. Each profile reflects how much evidence was collected, how strong the checks were, and how well the person matched the evidence. Under GPG 45, profiles map to low, medium, high, or very high confidence.
How Identity Profiles Work
An identity profile is not a single test result. It is an aggregated confidence outcome built from several checks, so the final profile reflects both the number of checks completed and the strength of the evidence behind them.
This matters because one strong document check can mean something very different from several weaker checks that happen to point in the same direction. The profile is the mechanism that turns those separate signals into a usable confidence level for decision-making.
Under GPG 45, the result is usually expressed as a confidence tier, such as low, medium, high, or very high. That tier is a shorthand for how convincing the overall evidence set is, not a guarantee that identity is certain.
What the Profile Measures
The core idea is evidence quality, not just evidence count. A good profile considers how much evidence was collected, how authoritative each check was, and how closely the person matched the evidence presented.
That means identity profiling is sensitive to both coverage and strength. A profile built from multiple independent checks can produce a higher confidence level than one built from a single pass, but only when the checks are meaningful and internally consistent.
In practice, this makes the profile a summary of assurance. It tells a verifier whether the identity evidence is enough for the purpose at hand, such as account creation, access approval, or a regulated onboarding workflow.
Where Identity Profiles Fit in Identity Verification
Identity profiles sit between raw verification steps and the final assurance decision. They help standardise how evidence is interpreted so that different cases can be compared using the same confidence scale.
That is especially useful when organisations need to apply consistent rules across channels, vendors, or onboarding journeys. Without a profile, two people with similar evidence could be treated differently simply because their checks were assessed in an inconsistent way.
An identity profile also supports governance. It gives teams a structured way to explain why a person reached a particular confidence level, which is important when identity decisions must be reviewed, audited, or repeated later.
Why Confidence Levels Matter
Confidence levels matter because identity verification is always a risk trade-off. A low-confidence result may be adequate for a low-risk interaction, while a high- or very-high-confidence result may be needed when the consequence of impersonation is greater.
The profile therefore helps match the assurance level to the use case. It does not replace policy or judgement, but it gives decision-makers a clearer basis for choosing whether to accept, escalate, or repeat verification.
It also helps avoid a common mistake: treating identity proofing as binary. Real verification is usually probabilistic, and the profile is the practical way that uncertainty is expressed in operational terms.
Risk and Threat Considerations
Identity profiles can be weakened when organisations over-trust partial evidence, accept inconsistent checks, or treat a confidence tier as stronger than the underlying evidence really supports. That creates exposure to impersonation, account fraud, and poor downstream access decisions.
Failure mechanism: Weak or inconsistent verification steps can still be combined into a profile that appears authoritative, especially if the process rewards completion over evidence quality. If the profile logic is poorly governed, an attacker may only need to satisfy the easiest checks to reach an acceptable tier.
Impact: The result can be wrongful identity acceptance, which then affects onboarding, access granting, recovery workflows, and any control that relies on the profile as an assurance signal.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-63, NIST SP 800-53 Rev 5 and NIST CSF 2.0 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-63 | IA-5 — Authenticator Management | Identity profiles depend on the quality and management of identity evidence and authenticators. |
| IA-12 — Identity Proofing | The term directly concerns identity proofing confidence built from multiple verification steps. | |
| Recommendation — Map each confidence tier to the identity evidence and authenticator strength required for that decision. Set proofing thresholds that align each confidence tier to the intended assurance use case. | ||
| NIST SP 800-53 Rev 5 | IA-8 — Identification and Authentication (Non-Organizational Users) | Identity profiles are used to assess the assurance of external user identity verification. |
| Recommendation — Require evidence-based proofing outcomes before accepting a non-organizational identity. | ||
| ISO/IEC 27001:2022 | A.5.16 — Identity management | Identity profiles support governed identity assurance and consistent identity lifecycle decisions. |
| Recommendation — Define policy for how identity confidence levels are created, reviewed, and accepted. | ||
| NIST CSF 2.0 | PR.AA-04 — Identity Management, Authentication and Access Control | Identity profiles are an identity assurance input to access decisions. |
| Recommendation — Use identity confidence levels as an input to access control decisions and review. | ||
Practitioner Guidance
Why practitioners should care: Identity profiles are most useful when they are tied to a clear policy threshold. Teams should define what each confidence tier is allowed to support, rather than assuming that a higher label automatically justifies a broader set of actions.
Governance implication: The profile model needs ownership, review criteria, and consistent evidence rules. If the rules change across journeys or providers, the same tier can mean different things in practice, which undermines comparability and auditability.
Practitioner takeaway: Treat the profile as an assurance summary, not as proof by itself, and make sure the underlying checks are strong enough for the decision the organisation will take.
Related resources from NHI Mgmt Group
- Why do profile mappings matter so much in federated identity?
- How should teams migrate from profile-based MDM to identity-centric UEM?
- Why do passkeys change the risk profile for human identity programmes?
- Why do vishing attacks bypass traditional phishing training and create a different risk profile for identity security teams?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 27, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
