Smart Blockchain-Based Access Control for the Internet of Things

2026-06-11

AI Summary

This work addresses the challenge of reconciling security and low latency in large-scale IoT environments under static blockchain endorsement policies. The authors propose a risk-adaptive access control mechanism on Hyperledger Fabric that, for the first time, integrates off-chain LSTM-based risk prediction with on-chain smart contract validation. Without modifying the consensus layer, this approach enables dynamic, fine-grained adjustment of endorsement policies driven by real-time risk assessment: high-risk transactions trigger stronger verification guarantees, while benign requests retain low-latency confirmation. Experimental results demonstrate that the system significantly enhances security without compromising performance, effectively maintaining high throughput and responsiveness even under varying threat conditions.

Abstract

Securing access control in large-scale Internet of Things (IoT) deployments requires mechanisms that adapt to risk while preserving low latency for benign traffic. Permissioned blockchains such as Hyperledger Fabric offer auditability through smart contracts, but static endorsement policies impose the same validation depth on all requests, regardless of security posture. We propose a risk-adaptive enforcement layer for Hyperledger Fabric that couples an off-chain LSTM-based risk oracle with deterministic on-chain checks. The oracle assigns each request to a tier (Low, Moderate, High) and issues a signed attestation bound to the client identity and target key/version. Endorsing peers verify the attestation in chaincode and enforce tier-conditioned SBE policies without modifying the ordering service or consensus. Experiments on a Fabric testbed show that tier-conditioned endorsement strengthens validation for higher-risk requests while retaining low confirmation latency for benign workloads.

Problem

• IoT access control
• risk-adaptive security
• permissioned blockchain
• endorsement policy
• low latency

Innovation

• risk-adaptive access control
• blockchain-based enforcement
• LSTM-based risk oracle
• tier-conditioned endorsement
• Hyperledger Fabric