Break and Inspect

Expanded Definition

Break and inspect is a traffic interception method that decrypts, examines, and then re-encrypts network data so security controls can apply policy inspection to sessions that would otherwise be opaque. In enterprise environments, it is most often deployed at secure web gateways, proxies, or inline firewalls to spot malware, credential theft, policy violations, and data exfiltration. For NHI governance, the concept matters because encrypted traffic often carries API calls, service-to-service requests, and automation tokens that influence how non-human identities behave across systems.

Definitions vary across vendors on how much session visibility this technique should provide and how aggressively privacy exceptions should be handled. No single standard governs this yet, so implementation usually reflects a local risk decision rather than a universally settled model. The control is distinct from endpoint telemetry or browser-level policy enforcement, which can observe or restrict activity inside the client rather than outside the session. The most common misapplication is treating break and inspect as a complete control for data use, which occurs when teams assume decrypted traffic visibility also governs what an agent, browser, or script does after the request is allowed.

Examples and Use Cases

Implementing break and inspect rigorously often introduces latency, certificate management overhead, and user trust concerns, requiring organisations to weigh inspection depth against operational friction.

• Inspecting outbound web traffic from managed endpoints to detect credential harvesting pages before users submit secrets or tokens.
• Monitoring API calls from automation platforms when service accounts reach external endpoints that may carry sensitive payloads.
• Applying policy to cloud access traffic while allowing approved business sites to pass through with reduced inspection exceptions.
• Detecting exfiltration attempts hidden inside encrypted sessions to file-sharing, messaging, or paste services.
• Using session decryption alongside identity controls to reveal whether an NHI is making unusual requests that deserve investigation.

For broader NHI context, the Ultimate Guide to NHIs explains why visibility into service account behavior is often weak, while the NIST Cybersecurity Framework 2.0 provides a practical structure for aligning monitoring with governance and risk response.

Why It Matters in NHI Security

Break and inspect is relevant in NHI security because encrypted traffic frequently contains the very signals defenders need to understand whether a service account, API key, or agent is behaving normally. When teams cannot see inside sessions, they may miss exfiltration, misuse of privileged credentials, or abnormal automation paths that blend into routine traffic. That visibility gap becomes more serious when NHIs are overprivileged or poorly inventoried. NHIMG reports that only 5.7% of organisations have full visibility into their service accounts, which shows how often the problem is not just transport encryption but identity blind spots that sit behind it.

The security value is real, but so is the governance burden: certificate distribution, device trust exceptions, privacy review, and false positives all increase operational complexity. The technique is therefore most useful when paired with identity-centric controls, logging, and policy enforcement rather than treated as a standalone safeguard. Organisations typically encounter the consequences only after an alert, leak, or incident review reveals that encrypted traffic was concealing NHI abuse, at which point break and inspect becomes operationally unavoidable to address.

Related resources from NHI Mgmt Group

• Break-and-Inspect Architecture
• When does least privilege break down for machine identities?
• Why do human-centric IAM models break down for agentic AI?
• Why do privileged access controls break down in hybrid environments?