Attack-surface discovery algorithms
Security teams rarely have a complete map of their own external footprint. Finding what's actually exposed — inside rules the client sets, not rules we assume — is the harder half of the problem.
How it broke down
Problem
An organization's external domain structure grows faster than anyone tracks it — subdomains, forgotten hosts, and assets spun up outside the standard process accumulate quietly.
Constraint
Discovery can't mean probing without limits. What can be scanned, how aggressively, and where "in scope" ends had to be strict rules the algorithm respected — not a default we assumed on the client's behalf.
Approach
Scoring and exploration logic were co-designed directly with the client's security team, so the algorithm's boundaries matched their actual risk tolerance rather than a generic default — the client set the rule, the algorithm respected it.
Outcome
The result routinely surfaces assets — forgotten subdomains, legacy hosts — that the client didn't know were part of their attack surface, discovered entirely inside the agreed rules of engagement.
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