Least Privilege is the security principle that users, programs, and systems should only have the minimum access rights necessary to perform their functions.
Least Privilege
Least Privilege is the security principle that users, programs, and systems should only have the minimum access rights necessary to perform their functions.
Why It Matters
Over-privileged credentials are a leading cause of breach escalation. CISA lists least privilege as a top security recommendation. When a compromised credential has broad permissions, the blast radius of a breach expands dramatically.
How It Works
Access is granted at the narrowest possible scope: specific API endpoints, limited time windows, restricted IP ranges, and capped usage. As needs change, permissions are adjusted — never accumulated.
Best Practices
- Default to no access and grant permissions explicitly
- Time-bound access for temporary needs (contractors, projects)
- Review permissions regularly and revoke unused access
- Use separate credentials for different privilege levels
Common Mistakes
- Granting admin access "temporarily" and never revoking it
- Using a single API key with full permissions across all services
- Not scoping contractor access to specific resources
How ShieldKey Helps
ShieldKey enforces least privilege at the token level. Each Shield Token can be scoped with IP restrictions, spend limits, and rate caps — ensuring every team member has exactly the access they need and nothing more.
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What is the principle of least privilege?
Least privilege means granting only the minimum permissions needed for a task. If a developer only needs read access to an API, they shouldn't get write permissions.