Blockchain technology, known for its decentralized, transparent, and secure nature, has deeply integrated into modern daily life, profoundly impacting various industries. The Hong Kong Polytechnic University (PolyU) has achieved remarkable accomplishments in blockchain-related research, enhancing the security and efficiency of blockchain ecosystems and driving the development of Web3.
Under the leadership of Professor Au Man Ho, Associate Head of Research and Development in the Department of Computing, and Professor Lok Hia Pong, Professor in the Department of Computing and Director of the Blockchain Technology Research Center, the research team at PolyU is dedicated to advancing cutting-edge developments in blockchain and Web3, delivering significant social and economic benefits.
Professor Au remarked, "Reflecting on the past 15 years of blockchain technology development, from its early application solely in cryptocurrencies to its widespread global use today, I am highly confident in its prospects for the next 15 years."
Professor Lok added, "Beyond research, PolyU also offers a Master of Science program in Blockchain Technology to nurture talent in this field, cultivate future innovation leaders, and foster industrial transformation and technological progress."
As blockchain technology evolves from its cryptocurrency origins to encompass diverse sectors and support key areas of Web3, demands for security, privacy, interoperability, and efficiency continue to grow. Initially designed to secure decentralized currency transactions, blockchain systems now face challenges in handling more complex and sensitive applications.
While decentralization is widely praised, vulnerabilities—such as those in smart contracts—remain, highlighting the critical need for enhanced security measures.
Innovations in Zero-Knowledge Proof Technology
Professor Au and his research team leverage innovative zero-knowledge proof (ZKP) technology to protect transaction privacy and ensure data integrity. As a crucial privacy-enhancing technology (PET), ZKP maintains confidentiality and completeness of transactions without revealing any details, making it indispensable for industries with high secrecy requirements. Although ZKP has been developed for some time, the team continuously addresses real-world challenges to advance its practical applications.
This research focuses on accelerating ZKP generation and verification processes, ensuring privacy while reducing transaction time. Their digital signature verification is several times faster than existing methods, enabling private transactions without compromising speed, thereby promoting broader adoption of ZKP in blockchain.
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Enhancing System Security
Blockchain applications now span various fields, including healthcare and supply chain management. In finance, central bank digital currencies (CBDCs) are increasingly adopting blockchain-based solutions. Over 100 countries are actively developing CBDCs using blockchain or related technologies. For environmental, social, and governance (ESG) reporting, the World Bank is exploring blockchain platforms to support emission reduction reporting and carbon credit trading.
Securing Web3 and blockchain ecosystems is paramount. Professor Lok’s team employs innovative methods and tools to identify vulnerabilities in core components of blockchain systems, assisting developers in addressing security issues and defending against attacks.
Moreover, the team has discovered numerous unknown security vulnerabilities in blockchain infrastructure, third-party services, and smart contracts—many of which are unknown even to developers. To tackle this, they developed novel techniques to accelerate the identification of known vulnerabilities, reporting findings to developers for resolution, earning widespread industry recognition.
Through proactive defense strategies, the team analyzes attacks and malware within blockchain ecosystems, particularly in smart contracts and applications, tracking attackers and protecting victims. This work provides critical references for safeguarding the entire industry.
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Frequently Asked Questions
What is zero-knowledge proof (ZKP) technology?
ZKP is a cryptographic method that allows one party to prove to another that a statement is true without revealing any additional information. It enhances privacy in transactions and is vital for applications requiring confidentiality.
How does blockchain support central bank digital currencies (CBDCs)?
Blockchain provides a decentralized, secure, and transparent framework for issuing and managing CBDCs. It enables efficient cross-border transactions, reduces fraud, and improves financial inclusion.
Why are smart contracts vulnerable to security risks?
Smart contracts are self-executing agreements with code that may contain flaws or unintended loopholes. These vulnerabilities can be exploited by attackers, leading to financial losses or system breaches.
What role does Web3 play in blockchain development?
Web3 represents the next generation of the internet, built on decentralized blockchain technology. It aims to give users greater control over their data, identity, and digital assets, fostering a more open and equitable online ecosystem.
How can organizations enhance blockchain security?
Organizations should conduct regular audits, employ advanced monitoring tools, and adopt privacy-enhancing technologies like ZKP. Collaborating with research institutions for vulnerability assessments is also beneficial.
What are the environmental impacts of blockchain technology?
While some blockchain networks consume significant energy, advancements in consensus mechanisms (e.g., proof-of-stake) and energy-efficient protocols are reducing the environmental footprint, supporting sustainable development.