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A four-tier verification system enhances AI agent skill security, indicating high detection accuracy for threats.
A four-tier verification pipeline for AI agent skills implementing defense-in-depth security. Tier 1 (Fast Pass) provides O(n) pattern matching against known threat signatures. Tier 2 (Guard Model) uses LLM-based semantic analysis to detect Line Jumping, Scope Drift, and Trojan Skills. Tier 3 (Sandbox) monitors runtime behavior in isolated containers. Tier 4 (Registry) provides cryptographic signing with Ed25519 and Merkle tree integrity verification. Validation against the OpenClaw skills ecosystem demonstrates 96.3% detection accuracy for known attack patterns. Reference implementation: fdaa-cli.
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Ada et al. (2026) studied this question.
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