Decentralized Firmware Integrity Verification Demonstrated on Ethereum Testnet

Global: Decentralized Firmware Integrity Verification Demonstrated on Ethereum Testnet

Researchers have introduced a decentralized framework for verifying firmware integrity in cyber‑physical systems, leveraging the Ethereum blockchain to store cryptographic hashes of firmware binaries. The approach was prototyped on the Sepolia testnet, employing a Python client that computes SHA‑256 hashes and interacts with smart contracts via Web3 and Infura. By enabling tamper‑proof, transparent validation, the system aims to mitigate risks associated with compromised firmware, insider threats, and single points of failure.

Motivation and Challenges

Firmware integrity is critical for the reliable operation of cyber‑physical systems, where malicious modifications can lead to persistent backdoors or catastrophic failures. Conventional safeguards such as secure boot, digital signatures, and centralized hash repositories are increasingly vulnerable to insider attacks and centralized failures, prompting the exploration of distributed alternatives.

System Architecture

The proposed architecture stores SHA‑256 hashes of firmware images within immutable smart contracts on the Ethereum blockchain. A lightweight Python‑based client computes these hashes locally and submits them to the contract through Infura’s API, ensuring real‑time registration and verification without reliance on a central authority.

Implementation on Ethereum Sepolia

Developers deployed the verification contracts to the Sepolia testnet, selected for its compatibility with Ethereum tooling and lower transaction costs. The client tool communicates with the contracts to register new firmware hashes and subsequently query the blockchain to confirm authenticity, demonstrating end‑to‑end functionality with actual firmware samples.

Experimental Evaluation

Testing confirmed successful contract deployment, accurate hash registration, and reliable integrity checks performed via live blockchain transactions. Measured gas fees remained modest, supporting the claim that the solution is cost‑effective and scalable for broader deployment in real‑world environments.

Scalability Enhancements

To address potential performance bottlenecks, the authors discuss extending the framework with Layer‑2 rollup solutions and off‑chain storage using the InterPlanetary File System (IPFS). These techniques could reduce on‑chain data volume while preserving verifiability.

Potential Integrations

The paper outlines pathways for integrating the blockchain‑based verification with existing security mechanisms, including secure boot processes, Trusted Platform Module (TPM) attestation, and zero‑trust architectures, thereby strengthening overall system resilience.

Implications for CPS Security

By providing a decentralized, tamper‑resistant method for firmware validation, the framework contributes to defending against supply‑chain attacks and unauthorized firmware modifications in critical infrastructure and industrial control settings.

Conclusion

The study demonstrates a practical, extensible model for blockchain‑enabled firmware integrity verification, highlighting its feasibility, low operational cost, and compatibility with emerging security paradigms.

This report is based on information from arXiv, licensed under Academic Preprint / Open Access. Based on the abstract of the research paper. Full text available via ArXiv.