Smart Blockchain-Based Access Control for the Internet of Things
This work addresses the need for adaptive security in permissioned blockchain-based IoT access control, but the approach is incremental as it builds on existing Hyperledger Fabric mechanisms.
The paper proposes a risk-adaptive access control layer for Hyperledger Fabric that uses an LSTM-based risk oracle to assign requests to tiers, enabling tier-conditioned endorsement policies. Experiments show it strengthens validation for high-risk requests while maintaining low latency for benign traffic.
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.