Briefing
The core problem addressed is the failure of traditional DeFi security mechanisms to prevent complex, high-value exploits that utilize private transaction relays or execute entirely within a single block, bypassing public mempool screening and static analysis. The research introduces the Proof of Inference Model (PoIm), a novel mechanism that enables cost-effective, fully on-chain execution of machine learning inference, even for non-linear models, to serve as a real-time transaction firewall. Model updates within PoIm are governed by a proof-of-improvement mechanism, where new models are only accepted if they demonstrably enhance core security metrics on a public benchmark, with financial penalties for adversarial proposals. This new theory fundamentally shifts blockchain security architecture by moving from reactive, off-chain monitoring to proactive, verifiable, and decentralized on-chain defense, enabling the secure and high-throughput execution of complex logic previously confined to centralized systems.
Context
The prevailing security paradigm for decentralized finance relied heavily on static code audits, external off-chain monitors, and public mempool analysis. This approach proved inadequate against sophisticated exploits, particularly those leveraging private transaction channels or executing complex, multi-step attacks entirely within the confines of a single block. This inadequacy is evidenced by the $3.74 B in losses curated across EVM chains from 2020 to 2025. The theoretical limitation was the inability to perform computationally expensive, dynamic, and model-based inference within the strict gas limits and deterministic environment of the EVM, forcing security to remain centralized and reactive.
Analysis
The paper’s core mechanism, PoIm, overcomes the EVM’s computational constraints by optimizing and serializing complex machine learning models into constant-time evaluation logic. This is achieved through techniques like quantization and loop-unrolling, which enable bit-exact, formally proven execution within the block gas limit. Conceptually, PoIm acts as a decentralized, self-governing oracle for security, supporting a model-agnostic range of algorithms from simple linear classifiers to deep neural networks. The system’s security is derived from its economic mechanism ∞ model improvements must be proven on a public benchmark, and malicious updates are financially penalized through an adaptable test set, ensuring the on-chain firewall remains accurate and resistant to adversarial manipulation.
Parameters
- Total Exploit Losses ∞ $3.74 B (Total value of curated real-world exploits from 2020-2025 across eight EVM chains, demonstrating the scale of the problem PoIm addresses)
- Attack Detection Accuracy ∞ 97% (Attack detection accuracy achieved by PoIm on previously unseen attacks, validating the model’s effectiveness as a firewall)
- On-Chain Inference Cost ∞ 57,603 gas (The cost for a single, fully on-chain inference using a linear model on an L1 like Ethereum, demonstrating the cost-effectiveness breakthrough)
Outlook
This research establishes a new frontier for verifiable computation by demonstrating the feasibility of complex, high-utility machine learning inference on-chain. The immediate next step involves generalizing the PoIm framework beyond exploit mitigation to other complex on-chain decision-making processes, such as decentralized risk scoring, automated governance, and fair-market mechanism design. Within 3-5 years, this capability could unlock a new generation of “Intelligent DeFi” protocols where financial primitives are secured and governed by self-improving, provably accurate on-chain AI models, leading to significantly more robust and resilient decentralized markets.
Verdict
The Proof of Inference Model fundamentally redefines the security perimeter of decentralized systems by integrating dynamic, economically-incentivized machine learning inference directly into the foundational transaction execution layer.
