API Credential Separation

Overview

Meaning in plain language

API credential separation uses distinct credentials for different applications, users, environments, purposes, or privilege levels to contain exposure. API credential separation prevents one secret from granting access across unrelated systems or operational contexts.

How it works

API credential separation prevents one secret from granting access across unrelated systems or operational contexts. Production, testing, development, merchants, internal services, and administrative tasks should generally use independently issued credentials with appropriate scopes.

Sharing credentials weakens attribution and increases blast radius because a single leak can affect many clients and teams. It also makes rotation, revocation, monitoring, and investigation difficult when the system cannot identify which workload performed an action.

Organizations should issue credentials per workload and environment, restrict each to necessary endpoints, and prohibit personal or production secrets in shared tooling. Separate credentials do not replace authorization , but they make least privilege, ownership, auditing, and incident containment substantially more effective.

For API Credential Separation, production scope should name the relevant endpoints, objects, workloads, secrets, dependencies, and tenant boundaries, the decision being supported, the accountable owner, and the time and jurisdiction boundaries.

For API Credential Separation, the trust decision should establish the use of distinct credentials for different applications, users, environments, purposes, or privilege levels to contain exposure.

Where people get it wrong

Keep scopes, storage, rotation, expiration and owners distinct. Sharing one powerful key across teams or systems makes incident containment much harder.

Related concepts

API Authorization, Secret Key, Webhook Verification.

Reference

OWASP API Security Top 10 (2023).