Summary
Multi-agent systems serving enterprise customers require security architectures that assume no component is trusted by default. Traditional perimeter security—firewalls protecting an internal trusted zone—fails when threats originate inside the network or when compromised components attempt lateral movement to valuable resources. Zero-trust architecture applies defense in depth: identity verification at every boundary, network controls limiting agent-to-agent communication, data isolation preventing cross-tenant leakage, and compliance controls mapping regulatory requirements to technical implementations.
Throughout the module, you worked through each security layer of a zero-trust multi-agent system. You assigned per-agent managed identities with role-based access control (RBAC) scoped to specific resources, configured federated identity credentials for user-context operations, and federated Kubernetes service accounts to managed identities—eliminating static credentials from every layer of the stack. You defined explicit allow-list network policies, routed traffic through private endpoints, enforced mutual transport layer security (TLS) between all agent services, and set up anomaly detection to surface unexpected communication patterns early.
For multitenant isolation, you propagated tenant context through every agent-to-agent call, enforced partition-key-based data isolation in Cosmos DB, validated tenant boundaries at every API endpoint, and gave customers control over their own encryption keys. Finally, you mapped EU data privacy, SOC 2, and HIPAA requirements to specific agent controls, implemented data residency enforcement and processing activity logging, and configured automated compliance reporting so evidence is always current.
These patterns ensure that Fabrikam's multi-agent code review system protects customer source code—the most sensitive data their customers possess—with cryptographic guarantees, network segmentation, and comprehensive audit trails that demonstrate compliance for regulators and customers.