BloodHound is a graph analysis tool for Active Directory. It collects identity data such as users, groups, computers, sessions, and delegated permissions, then models them as nodes and edges. By querying that graph, security teams can see how access is actually inherited and chained, not just how it looks in a permissions list.
This matters because many real compromises depend on privilege paths: a low-privilege account may reach an admin target through stale group membership, excessive delegation, or reused credentials. Defenders use BloodHound to find and remove those routes, improve least privilege, and separate sensitive administration from ordinary access. Attackers value the same view because it highlights the shortest path to escalation. In practice, BloodHound is both an assessment tool and a hardening aid for identity security.