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MVAR: Enhancing LLM Agent Security through Deterministic Prompt Injection Defense with Dual-Lattice Information Flow Control
Harnessing 40 Years of IFC Research (FIDES, Jif, FlowCaml) – Apache 2.0 Licensed

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🔒 MVAR: Elevate LLM Runtime Security

MVAR empowers organizations to secure their LLM agent runtimes against prompt-injection attacks. By combining information flow control and cryptographic provenance tracking, MVAR ensures sustainable tool functionality while maintaining safety and integrity.

Key Features:

  • Provenance Taint Tracking: Labels data integrity and confidentiality—ensuring any untrusted input renders derived outputs untrusted.
  • Capability Runtime: Implements a deny-by-default execution model, allowing explicit permission declarations for every tool.
  • Deterministic Sink Policy Evaluation: Provides three outcomes—ALLOW, BLOCK, or STEP UP—with full auditability.

💡 Why MVAR matters:
It shifts the paradigm from patching against specific vulnerabilities to a holistic enforcement of policies across agent runtimes—keeping tools effective without jeopardizing security.

Join the MVAR conversation! Share your thoughts or check out our GitHub repository: MVAR GitHub 📈

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