A Relay-Chain-Powered Ciphertext-Policy Attribute-Based Encryption in Intelligent Transportation Systems

2025-08-22

AI Summary

To address the dual challenges of dynamic access control and ultra-low-latency communication for secure data sharing in intelligent transportation systems (ITS) operating under heterogeneous, cross-domain, and highly dynamic environments, this paper proposes a context-aware architecture integrating a relay chain with an enhanced ciphertext-policy attribute-based encryption (CP-ABE) scheme. The architecture introduces a globally coordinated relay-chain-driven smart contract mechanism to enable real-time, context-aware policy evaluation; supports adaptive switching between fine-grained, multi-attribute encryption for high-sensitivity events and lightweight encryption for routine updates; and combines regional blockchain storage with dynamic policy mapping to achieve end-to-end encryption, decentralized access control, globally traceable revocation, and millisecond-level response. Experimental results demonstrate that the proposed scheme significantly reduces cryptographic overhead and communication latency, while maintaining strong security, scalability, and real-time performance under high-concurrency and high-mobility conditions.

Technology Category

• Application Domains: Transportation
• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Multiagent Systems: Agent Communication

Application Category

• Security and Privacy: Applications of cryptography
• Systems and Infrastructure for Web, Mobile and WoT: Location- and context-aware Web and WoT applications and services
• Responsible Web: Data and user privacy-enhancing technologies for the Web

Abstract

The very high growth of Intelligent Transportation Systems (ITS) has generated an urgent requirement for secure, effective, and context-aware data sharing mechanisms, especially over heterogeneous and geographically dispersed settings. This work suggests a new architecture that combines a relay chain-driven encryption system with a modified Ciphertext-Policy Attribute-Based Encryption (CP-ABE) scheme to tackle the double impediment of dynamic access and low-latency communication. The model proposes a context-aware smart contract on a worldwide relay chain that checks against data properties, including event type, time, and geographical region, to specify the suitable level of encryption policy. From such relay-directed judgment, On-Board Units (OBUs) encrypt data end-to-end by utilising CP-ABE and store ciphertext inside localised regional blockchains, preventing dependence on symmetric encryption or off-chain storage. High-sensitivity events are secured with firm, multi-attribute access rules, whereas common updates use light policies to help reduce processing burdens. The crypto system also adds traceability and low-latency revocation, with global enforcement managed through the relay chain. This distributed, scalable model provides a proper balance between responsiveness in real time and security and is extremely apt for next-gen vehicular networks that function across multi-jurisdictional domains.

Problem

• Secure data sharing in intelligent transportation systems
• Dynamic access control with low-latency communication
• Context-aware encryption across multi-jurisdictional vehicular networks

Innovation

• Relay chain-driven encryption with CP-ABE
• Context-aware smart contracts for encryption policies
• Distributed blockchain storage with traceability features