Blast Radius is the scope of damage that results from a security incident, measured by the number of systems, data, and users affected.
Blast Radius
Blast Radius is the scope of damage that results from a security incident, measured by the number of systems, data, and users affected.
Why It Matters
A single compromised API key with broad permissions can affect every service it touches. The IBM 2024 breach report found that larger blast radius breaches cost significantly more — breaches affecting multiple environments average $4.88 million.
How It Works
Blast radius is determined by the permissions of the compromised credential, the services it has access to, the data it can reach, and the time between compromise and detection. Reducing any of these factors shrinks the blast radius.
Best Practices
- Apply least-privilege to every credential
- Segment services so one compromised key can't access everything
- Set spend limits and rate caps
- Minimize detection time with monitoring and alerting
Common Mistakes
- Using a single API key with admin permissions across all services
- Not segmenting production and development credentials
- Ignoring the blast radius when assessing credential risk
How ShieldKey Helps
ShieldKey minimizes blast radius by giving each team member a scoped Shield Token instead of the master key. If one token is compromised, only that token's permissions are at risk — not the full API key.
Try ShieldKey FreeFAQ
What is blast radius in security?
Blast radius is how much damage a security incident can cause. A leaked API key with full admin access has a larger blast radius than a key scoped to a single read-only endpoint.