Blockchain-Enabled Cyber Threat Intelligence Sharing for Next Gen Cyber Defense

Abstract

The growing sophistication of cyberattacks requires unprecedented levels of collaboration across organizations and sectors. However, current cyber threat intelligence (CTI) sharing practices are hampered by trust issues, data privacy concerns, and centralized control models. This paper explores blockchain technology as an enabler for secure, decentralized, and tamper proof CTI sharing networks. The proposed model employs smart contracts to automate data exchange agreements and incentive mechanisms for active participation. Blockchain’s immutable ledger ensures transparency and accountability, while cryptographic techniques safeguard sensitive information. Through simulations and comparative analysis, the study demonstrates how blockchain-based CTI sharing outperforms traditional centralized platforms in terms of resilience, trust, and availability. The research also addresses scalability challenges, regulatory implications, and integration with existing security frameworks. By combining blockchain with AI-driven threat analytics, the paper highlights a hybrid approach that can empower global cyber defense collaboration against sophisticated adversaries.

KEYWORDS: Blockchain, Threat Intelligence Sharing, Cybersecurity Collaboration, Smart Contracts, Decentralized Defense