Core Applications: Building a Multi-Dimensional Security Defense System - The decentralized identity management and zero-trust model provided by blockchain technology revolutionizes identity management, allowing users to fully control their personal information through self-sovereign identity (SSI) technology and smart contracts for "on-demand authorization" [3] - Blockchain's immutable audit trails and threat intelligence sharing enhance security event traceability, enabling quick identification and freezing of malicious transactions, thus preventing significant financial losses [4] - In supply chain and healthcare, blockchain's traceability effectively combats counterfeiting, with luxury brands using it to verify product authenticity and hospitals streamlining insurance claims processes [5] - The integration of blockchain with IoT enhances attack resistance, creating a multi-layered defense network that significantly reduces the success rate of DDoS attacks [6] Technological Breakthroughs: Key to Addressing Emerging Threats - Privacy protection and quantum security advancements, such as zero-knowledge proof (ZKP) technology, improve transaction efficiency while maintaining privacy, with significant reductions in verification time [7] - The deep integration of AI and blockchain creates an "intelligent immune system," enhancing fraud detection and operational efficiency in various sectors [8] - Innovations in cross-chain interoperability and smart contract security are addressing vulnerabilities, with improved verification architectures and AI-assisted tools significantly increasing vulnerability detection rates [9] Challenges and Future Outlook - Technical bottlenecks, such as throughput and energy consumption, remain constraints for blockchain adoption, necessitating further exploration of privacy protection and regulatory compliance [10] - The establishment of industry alliances and collaborative frameworks is essential for enhancing blockchain security and preventing data silos [11] - Predictions indicate that blockchain will not only drive technological innovation but also transform security paradigms, becoming a core engine for building a trusted digital ecosystem [12]