Designated requirements are the rules used to decide whether a code signature satisfies a particular trust policy. They combine conditions such as an identifier, certificate anchor and allowed signing attributes, so a verifier can match the right signing identity and execution permissions.
What Designated Requirements Mean in Practice
Designated requirements are the policy rules that tell a verifier which code signature should be trusted for a given execution context. They are not the signature itself, but the matching logic around it, combining identity anchors and allowed signing attributes so the system can decide whether the code is authorised to run.
That distinction matters because a signature can be technically valid while still failing the policy that governs a specific app, bundle, or platform. In practice, designated requirements narrow trust from “signed by someone acceptable” to “signed by the right entity, under the right conditions.”
How Designated Requirements Shape Code Trust
A designated requirement usually expresses the properties that the verifier must see before granting trust. Those properties can include a certificate anchor, a signing identifier, and other constraints that tie the code to a particular publisher or execution rule set. The result is a policy decision, not a cryptographic verification alone.
This makes designated requirements a control point for software trust decisions across macOS and similar code-signing environments. They help prevent one validly signed binary from being treated as interchangeable with another when the deployment policy expects a specific signing identity or entitlement pattern.
Where They Fit in the Signature Verification Flow
In the verification flow, the system first checks that the signature is structurally valid and chains to a trusted anchor. It then evaluates whether the code meets the designated requirement. If the requirement fails, the signature may still be valid in a cryptographic sense, but it does not satisfy the trust policy for that execution decision.
That separation between cryptographic validity and policy fit is what makes designated requirements useful. They let administrators and platform controls express trust in a more precise way than certificate trust alone, especially where different products or components share a signing ecosystem.
Why They Matter for Platform Security and Policy Enforcement
Designated requirements reduce ambiguity in signed software trust by binding execution permission to an expected signer and expected attributes. OWASP ASVS is relevant here because the same security principle applies at the application layer, trust decisions should be based on explicit verification conditions, not assumptions about provenance alone.
They also support safer update and execution workflows where multiple signed components may coexist. If the policy is too broad, trust can extend further than intended; if it is too narrow, legitimate software may fail to launch or update, creating operational friction.
For organisations that manage signed software at scale, the important question is whether the designated requirement accurately reflects the signing identity and attributes that the trust policy was designed to accept. When that policy drifts from reality, the verifier can either admit the wrong code or reject the right code.
Risk and Threat Considerations
Designated requirements become risky when they are overly permissive, stale, or mismatched to the intended signer. In that case, a malicious or unintended binary can satisfy the trust policy, or a legitimate binary can be blocked while a weaker fallback path is used.
Failure mechanism: If the requirement is anchored to the wrong identifier, certificate chain, or signing constraint, an attacker may be able to reuse a trusted signing path, abuse a substitute certificate, or exploit policy drift to get untrusted code treated as approved.
Impact: The result can be unauthorised code execution, weakened software provenance checks, and a broader trust boundary than the organisation intended, especially where execution policy is used as a gate for privileged application behaviour.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP ASVS provides the primary governance reference for this term.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP ASVS | V8 — Authorization | Designated requirements enforce which signed code is allowed to run under a trust policy. |
| Recommendation — Define explicit authorization checks for signed code and reject binaries that do not meet the required trust conditions. | ||
Practitioner Guidance
Why practitioners should care: Designated requirements are a policy control, so the main governance task is making sure the requirement matches the real trust decision the platform is supposed to enforce. Review them whenever signing identities, certificate anchors, or deployment rules change, because a small mismatch can alter what the verifier accepts.
Common misunderstanding: Teams often treat a valid signature as proof that the software should run everywhere. In reality, signature validity and requirement satisfaction are separate checks, and both must align for the trust policy to hold.
Practitioner takeaway: Treat the requirement as part of the security boundary, not just metadata around code signing.
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Reviewed and updated by the NHIMG editorial team on November 3, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org