CapSeal: Capability-Sealed Secret Mediation for Secure Agent Execution
Modern AI agents routinely depend on secrets such as API keys and SSH credentials, yet the dominant deployment model still exposes those secrets directly to the agent process through environment variables, local files, or forwarding sockets. This design fails against prompt injection, tool misuse, and model-controlled exfiltration because the agent can both use and reveal the same bearer credential. We present CapSeal, a capability-sealed secret mediation architecture that replaces direct secret access with constrained invocations through a local trusted broker. CapSeal combines capability issuance, schema-constrained HTTP execution, broker-executed SSH actions, anti-replay session bindin...
| Authors | Shutong Jin, Ruiyi Guo, Ray C. C. Cheung |
|---|---|
| Primary category | cs.CR |
| Published | 18 April 2026 |
| Last updated at source | 18 April 2026 |
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