PolyU wins ZPRIZE 2023 for blockchain innovation again demonstrating groundbreaking research in zero-knowledge proofs

The research team led by Prof. Allen AU Man Ho, Professor of the Department of Computing at The Hong Kong Polytechnic University (PolyU) and Dr Lu Xingye, Research Assistant Professor, have won an award in the international ZPRIZE competition for the second consecutive year for their pioneering work in zero-knowledge proofs (ZKPs). Their groundbreaking work in this field has profound implications for enhancing privacy and scalability in blockchain and Web3 applications.

Prof. Christopher CHAO, PolyU Vice President (Research and Innovation), said, “We take great pride that PolyU academics continue to gain worldwide acclaim for driving innovation in cutting-edge technologies like blockchain and zero-knowledge cryptography. This award underscores the exceptional capabilities of our research team and their pioneering work in accelerating the development and real-world adoption of zero-knowledge encryption.”

The annual ZPRIZE competition, spearheaded by the blockchain industry in 2022, promotes the advancement of ZKPs by open-sourcing winning submissions for the reference of the general public. ZKPs allows a “prover” to convince a person of the validity of a computation without leaking any information; it is hence referred to as zero-knowledge cryptography.

This year, the PolyU team have triumphed in the “High Throughput Signature Verification” open division category, winning a cash prize of US$250,000. They were tasked with verifying the greatest number of Elliptic Curve Digital Signature Algorithm (ECDSA) signatures in a given time using ZKPs. ECDSA signatures are used to prove the authenticity and integrity of digital messages over the internet, as well as of blockchain transactions on networks such as Bitcoin and Ethereum. Making it more efficient to cryptographically verify those signatures inside a ZKP is important for creating a better user experience and enables numerous real-world applications.

The PolyU team’s innovative approach can generate ZKPs for the digital signatures of 50 1KB messages on a regular laptop computer within ten minutes, laying a solid foundation for future applications of ZKPs in ECDSA verification. It also reduces the complexity of generating proofs for a 5MB message’s digital signature to a maximum of 6.2 million constraints compared to over 50 million constraints previously - a minimum eight-fold reduction.

As a pioneer in blockchain education and research in Hong Kong, PolyU has introduced Hong Kong’s first Master of Science in Blockchain Technology programme. It has also initiated doctoral programmes relating to financial technology, as well as bachelor’s degree programmes relating to FinTech and Artificial Intelligence (AI). On the research front, the University has established the Research Centre for Blockchain Technology, the first research centre in Hong Kong whose research studies full-stack blockchain technology. According to the “Best Universities for Blockchain 2022” rankings by CoinDesk, PolyU has been ranked the No. 1 university for blockchain in the world.

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