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Personal profile


I'm a lecturer (equivalent to U.S. assistant professor) at Monash University, Australia, and an honorary research fellow working with Prof. Mark Ryan (HP Chair in Cybersecurity ) in the School of Computer ScienceUniversity of Birmingham, UK, where I received my PhD in computer science. I did my postdoc with Prof. Paulo Esteves-Verissimo (IEEE and ACM Fellow) at SnT, University of Luxembourg. 

My research interests are in the area of cybersecurity and cryptography. In particular, the focus of my research has been on design and analysis of cryptographic protocols, cryptographic key management, blockchain consensus, and ledger-based applications.

Main research impact:

My research on blockchain consensus, called RepuCoin, provides the first blockchain system that is able to tolerate the 51% attack. This system may save potentially millions of US dollars every month from the attacks, and increase the confidence of enterprise in adapting blockchains. (For example, from April 2018 to Feb 2019, at least ten successful 51% attacks are identified, with a total loss of over 28 million US dollars.) This work has been reported by over 60 news media globally including Monash NewsFinder今日头条(Toutiao), ZDNet, Sohu, BTC Wires, ScienceDaily, Ethereum World News, EurekAlert!, The US Breaking news, Homeland Security Today, etc.


Our work on the ledger-based end-to-end secure messaging system, called DECIM, provides the first end-to-end secure messaging system that is able to detect the compromise of secret keys. This system has been further developed by a University of Birmingham spin-off as open source software, and have attracted funding support from Innovate UK. The system has attracted news media's attention as a breakthrough in messaging privacy, and has been featured in more than 40 international and national news media including Science DailyPhys.orgACM TechNewsEurekAlertFuturism, and Silicon Republic. The news has been released in more than 7 languages by media from more than 10 countries including UK, US, Germany, Ireland, Luxembourg, Turkey, Spain, and India. I have also been invited for an interview (to explain my innovation to general listeners) by Eldoradio --- a member of RTL group which is one of the world's leading producers of television content and the leading European entertainment network.


Our work on attacking and analysing CryptoNote-style blockchains (CSF'19 FC'19 , and AsiaCCS'19) has traced 70%-91% transactions of supposed-to-be privacy-preserving cryptocurrencies, including Monero, ByteCoin, and DigitalNote. We also provided optimal solutions within our formal model. Here is a news article reporting our works.

I've also co-designed a secure booting solution for Huawei Ltd, the largest telecommunications equipment manufacturer in the world, to manage their next generation network devices securely.


For more details, please visit my personal website.


Research area keywords

  • Blockchain
  • Ledger-based applications
  • Cryptographic key management
  • Cybersecurity and user privacy

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Projects 2019 2022

In Search of Scalable Consensus Protocols for Public Blockchains in IoT Environment

Han, R., Liu, J., Yu, J., Baig, Z. A. & Knight, K.


Project: Research

Research Output 2012 2019

  • 9 Conference Paper
  • 8 Article
  • 1 Chapter (Book)
1 Citation (Scopus)

ANCHOR: logically centralized security for software-defined networks

Kreutz, D., Yu, J., Ramos, F. M. V. & Esteves-Verissimo, P., Feb 2019, In : ACM Transactions on Privacy and Security. 22, 2, 36 p., 8.

Research output: Contribution to journalArticleResearchpeer-review

Evaluating CryptoNote-style blockchains

Han, R., Yu, J., Liu, J. & Zhang, P., 2019, Information Security and Cryptology : 14th International Conference, Inscrypt 2018 Fuzhou, China, December 14–17, 2018 Revised Selected Papers. Guo, F., Huang, X. & Yung, M. (eds.). Cham Switzerland: Springer, p. 29-48 20 p. (Lecture Notes in Computer Science ; vol. 11449 ).

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

New empirical traceability analysis of CryptoNote-style blockchains

Yu, Z., Au, M. H., Yu, J., Yang, R., Xu, Q. & Fat Lau, W., 2019, Financial Cryptography and Data Security: 23rd International Conference, FC 2019 Frigate Bay, St. Kitts and Nevis, February 18–22, 2019 Revised Selected Papers. Goldberg, I. & Moore, T. (eds.). Cham Switzerland : Springer, Vol. 11598 LNCS. p. 133-149 17 p. (Lecture Notes in Computer Science; vol. 11598).

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

On the unforkability of Monero

Wijaya, D. A., Liu, J. K., Steinfeld, R., Liu, D. & Yu, J., 2019, Proceedings of the 2019 ACM Asia Conference on Computer and Communications Security. Gollmann, D., Kirda, E. & Liang, Z. (eds.). New York NY USA: Association for Computing Machinery (ACM), p. 621-632 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Open Access

Proof-of-QoS: QoS based blockchain consensus protocol

Yu, B., Liu, J., Nepal, S., Yu, J. & Rimba, P., Nov 2019, In : Computers & Security. 87, 13 p., 101580.

Research output: Contribution to journalArticleResearchpeer-review

Press / Media

Can Monero ever achieve private transactions?

Jiangshan Yu


1 item of Media coverage

Press/Media: Article/Feature

World-first secure blockchain with good reputation

Jiangshan Yu


5 items of Media coverage

Press/Media: Article/Feature

Computer scientists address gap in messaging privacy

Jiangshan Yu, Mark Ryan & Cas Cremers


9 items of Media coverage

Press/Media: Article/Feature