Zero-credential design means an agent or service operates without reusable secrets inside its own runtime. The system may still authenticate through a broker or proxy, but the actor never directly stores the credentials it uses, which sharply reduces the value of prompt injection and runtime compromise.
Expanded Definition
Zero-credential design is a workload pattern in which an agent or service never keeps reusable secrets in its own process, memory, or local configuration. Instead, identity proof and credential use are delegated to a broker, proxy, or platform control that can issue, rotate, and constrain access on demand. In NHI security, this is most often discussed alongside OWASP Non-Human Identity Top 10 guidance and dynamic-secret architectures, because the design goal is not “no authentication” but “no durable secret exposure inside the runtime.”
The term is still applied inconsistently across vendors. Some use it to mean the agent never sees a secret at all, while others include short-lived tokens passed through an intermediary. NHI Management Group treats the stricter interpretation as the safer one: the runtime should be unable to exfiltrate a credential that remains useful outside a narrow, policy-bound exchange. That makes zero-credential design especially relevant for autonomous agents, ephemeral jobs, and tool-using services that may face prompt injection or container escape attempts. The most common misapplication is calling a system zero-credential when it merely hides secrets in environment variables, which occurs when the runtime can still read and reuse them.
Examples and Use Cases
Implementing zero-credential design rigorously often introduces orchestration overhead, requiring organisations to weigh reduced secret exposure against added broker, policy, and observability complexity.
- A build agent requests a short-lived cloud token from a broker only when a deployment step starts, instead of storing a long-lived API key in the pipeline. See the NHIMG discussion of Ultimate Guide to NHIs — Static vs Dynamic Secrets.
- An AI agent calls internal tools through a proxy that signs requests centrally, so the agent can execute actions without ever holding reusable credentials in its own context.
- A containerised service uses workload identity federation with ephemeral access instead of mounted secret files, reducing the impact of a runtime compromise. This aligns with the identity assurance direction in NIST SP 800-63 Digital Identity Guidelines.
- Secrets rotation is handled entirely by the platform layer, which lets developers redeploy workloads without embedding tokens into application code or CI/CD variables.
- When teams study breaches like the CI/CD pipeline exploitation case study, zero-credential patterns often become a practical remediation target rather than a theoretical preference.
Why It Matters in NHI Security
Zero-credential design matters because reusable secrets are one of the easiest paths from a compromised workload to broader environment takeover. Once an agent or service can read a secret directly, prompt injection, memory scraping, log leakage, and filesystem access all become viable routes to abuse. This is why NHIMG repeatedly highlights secret sprawl as a systemic problem, including the Guide to the Secret Sprawl Challenge and breach cases such as the MongoBleed breach. NHIMG research shows that 23.7% of organisations still share secrets through insecure methods such as email or messaging applications, which is exactly the kind of behaviour zero-credential design is meant to eliminate.
Operationally, the model also supports stronger control alignment with NIST SP 800-53 Rev 5 Security and Privacy Controls, especially where least privilege, credential lifecycle control, and system integrity are concerned. It also complements OWASP Non-Human Identity Top 10 priorities by reducing the blast radius of NHI compromise. Organisations typically encounter the cost of not using zero-credential design only after a secret is recovered from a crashed workload or poisoned agent session, at which point the design choice becomes operationally unavoidable to address.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST SP 800-63, NIST CSF 2.0 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 | Zero-credential design reduces exposed secrets in workload runtimes. |
| NIST SP 800-63 | AAL2 | Identity assurance informs how short-lived delegated access should be validated. |
| NIST CSF 2.0 | PR.AC-4 | Least-privilege access management supports secretless workload operation. |
| NIST Zero Trust (SP 800-207) | SC-7 | Zero trust favors brokered access over embedded standing credentials. |
| OWASP Agentic AI Top 10 | A-04 | Agentic systems must avoid exposing reusable credentials to tool-using runtimes. |
Remove durable secrets from agents and services; use brokered, short-lived access instead.
Related resources from NHI Mgmt Group
- Why does zero-knowledge design matter for enterprise credential governance?
- What is the difference between zero standing privilege and simple credential rotation for agents?
- What breaks when credential vaulting is used as a substitute for zero standing privilege?
- Should organisations align PAM and zero trust policy design?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on July 12, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
