Welcome to the webpage of the FUSÉE Lab at the Department of Software and IT Engineering, ÉTS Montréal (University of Québec). FUSÉE is a research group composed primarily of graduate students, established in 2017 by Dr. Kaiwen Zhang. Our mission is to study and build distributed systems based on five aspects:

FUSÉE Properties
  • Fast, high-velocity, Big Data processing to achieve online analytics.
  • Unified and secure event-based frameworks for domains such as social networks, Internet of Things, online gaming.
  • Scalable distributed and decentralized systems to handle large volumes of data and users.
  • Event processing to support streaming operations such as aggregation, top-k filtering, and complex event detection.
  • Event messaging using the publish/subscribe abstraction for decoupled networked interactions.

Research Projects

Blockchain Layers

Practical Blockchain & DLT

Blockchain-based distributed ledger technology (DLT) processes and disseminates transaction events in a decentralized network. Our objective is to achieve the right balance of decentralization, consistency, and scalability to meet the requirements of important domains such as eHealth, IoT, and Smart Grids.

Unified Pub/Sub Architecture

Expressive Publish/Subscribe

Modern applications (e.g. social networks, sensor networks) require advanced analytics over real-time streams of events. We strive to support these expressive features without compromising performance or scalability by integrating lightweight distributed processing techniques into the publish/subscribe communication substrate.

Interest Management

Networked Game Engines

Networked games require low-latency, reliable, and cheat-resistant communication between players. We aim to develop scalable infrastructures for highly-interactive online games. By leveraging game semantics, such as player profiles and the virtual environment, we can achieve the right trade-off between consistency and performance.


Principal Investigator

Kaiwen Zhang Portrait

Kaiwen Zhang is an Assistant Professor in the Department of Software and IT Engineering at ÉTS Montréal (University of Québec). Previously, he was an Alexander von Humboldt postdoctoral fellow in Computer Science at the TU Munich (2015-2017) and a member of the Middleware Systems Research Group. Dr. Zhang obtained his B.Sc. and M.Sc. at McGill University in Montréal and his Ph.D. at the University of Toronto. His research interests include blockchain technologies, publish/subscribe systems, massively multiplayer online games, and software-defined networking. Dr. Zhang's expertise lies at the intersection of distributed systems, networking, and data management. His research is published in premier distributed systems conferences such as IEEE ICDCS and ACM Middleware.

Faculty Members

Research Members

  • Dr. Aamir Shahzad, Research Associate: Blockchain Systems for IoT and Supply Chain Management.

Student Members

  • Zahra Batool, Ph.D.: Fair and Traceable Federated Learning. Co-supervised with Matthew Toews.
  • Joel Poncha Lemayian, Ph.D.: Efficient Proof-of-Work (PoWs) for IoT Networks. Co-supervised with Pascal Giard.
  • Syed Muhammad Danish, Ph.D.: Middleware Services for Blockchain-IoT Applications. Co-supervised with Hans-Arno Jacobsen.
  • Sion Israel, Ph.D.: Towards Service-Oriented Oracles for Blockchains.
  • Reza Jahantigh, Ph.D.: Towards Practical Smart Contract Verification.
  • Suhail Kandanur, Ph.D.: Large-Scale Dynamic Graph Processing and Event Notification. Co-supervised with Bettina Kemme.
  • Reza Nourmohammadi, Ph.D.: Self-Tuning Blockchain Systems.
  • Muneem Shabir, Ph.D.: Blockchains for Software-Defined Networking.
  • Yahya Shahsavari, Ph.D.: Performance Modeling, Analysis, and Tuning of Blockchain Networks. Co-supervised with Chamseddine Talhi.
  • Michael Duchesne, M.A.Sc.: Design and Evaluation of a Smart Contract.
  • Steven Gourgue, M.Eng.: Interest Management for Mobile Games. Co-supervised with Julien Gascon-Samson.
  • Emna Hammemi, M.A.Sc.: Serverless Adapters for Decentralized Oracles. Co-supervised with Abdelouahed Gherbi.
  • Gabriel Hardy, M.A.Sc.: Data Center Infrastructures for DLT. Co-supervised with Pascal Giard.
  • Mahtab Norouzi, M.A.Sc.: Smart Contract-Based P2P Lending.
  • Kamyar Rostami, M.A.Sc.: Blockchain-Based Continuous Validation for Credentials.
  • Samin Sadri, M.A.Sc.: Blockchain-Driven Auditability in Health Information Systems.
  • Rodrigue Tonga, M.A.Sc.: Online Platform for Data Security in the Energy Sector.
  • Helmi Trabelsi, M.A.Sc.: Reducing MVCC Conflicts in Hyperledger Fabric.

Former Members

  • (2021) Sardar Basiri, M.A.Sc.: Combat-Optimized Network Engine for Multiplayer Games. Co-supervised with Stéphane Coulombe.
  • (2021) Louis Chavez-Cléroux, M.Eng.: Key Distribution System Encryption for Secure International Transmissions. Co-supervised with Pascal Giard.
  • (2021) Eduardo Furtado, M.Eng.: Secure Electronic Voting.
  • (2021) Mario Munoz, M.A.Sc.: Chain of Custody Traceability using Smart Contracts. Co-supervised with Mustapha Ouhimmou.
  • (2021) Subhasish Goswami, B.Eng. (TEZU): Modeling Blockchain Oracles.
  • (2021) Hrishabh Sharma, B.Eng. (SVNIT): Modeling the MVCC Problem in Hyperledger Fabric.
  • (2021) Devansh Swarup, B.Eng. (SRMIST): Decentralized Oracle Networks.
  • (2020) Thomas Maketa, Ph.D.: Consent-Driven Remittance over a Blockchain Network. Co-supervised with Alain April.
  • (2020) Wiem Badreddine, M.A.Sc.: Blockchain-Based Data Monetization for IoT. Co-supervised with Chamseddine Talhi. Best Master's Thesis Award.
  • (2020) Alaa Eddine Chouchane, M.A.Sc.: Privacy-Compliant Data Collection using Blockchains. Co-supervised with Chamseddine Talhi.
  • (2020) Sonia Slimani, M.A.Sc.: Real-Time Ad Exchange using Latency-Aware Publish/Subscribe.
  • (2020) Shiquan Zhang, M.Sc. (McGill): Modeling Selfish Mining Games. Co-supervised with Bettina Kemme.
  • (2020) Jean-François Corriveau, B.Eng.: Tracking the Carbon Footprint of Merchandise Delivery. Co-supervised with Pascal Giard.
  • (2019) Jorge Choqueneira, M.Eng.: Cross-Currency Payments over the Ethereum Network.
  • (2019) Adrien Gasté, M.Eng.: Object Caching for Interactive Web Applications. Co-supervised with Julien Gascon-Samson.
  • (2019) Étienne Boudreault-Pilon, B.Eng.: Smart Contracts for Letter of Credit. Co-supervised with Mustapha Ouhimmou, Bora Ung.
  • (2019) Helmi Trabelsi, B.Sc. (Sup'Com): Data Tokenization using Hyperledger Fabric.
  • (2018) Jelena Pacic, M.Sc. (TUM): EVA - Electrical Vehicle Charging using Blockchains. Github.
  • (2018) Daniel Sel, M.Sc. (TUM): Data Availability Problem in Sharded Ethereum.
  • (2018) Lyubomir-Leo Stoykov, M.Sc. (TUM): VIBES - Visualizing Interactive Blockchain Extended Simulations. Github.
  • (2017) Shankar Mohan Sathya, M.Sc. (TUM): Benchmarking Industrial Big Data Systems.
  • (2017) Jingyi Wang, M.Sc. (TUM): CSAIM - Combat State-Aware Interest Management. Github.
  • (2017) Nejc Zupan, M.Sc. (TUM): HyperPubSub - Federated Publish/Subscribe using Blockchains.

External Collaborators

Selected Publications

Full publication list @ Espace ÉTS

  • Early Detection for Multiversion Concurrency Control Conflicts in Hyperledger Fabric
    Helmi Trabelsi, Kaiwen Zhang. IEEE Crypto Valley Conference 2021.
  • BlockAIM: A Neural Network-Based Intelligent Middleware For Large-Scale IoT Data Placement Decisions
    Syed Muhammad Danish, Kaiwen Zhang, Hans-Arno Jacobsen. IEEE Transactions on Mobile Computing.
  • LogLog: A Blockchain Solution for Tracking and Certifying Wood Volumes
    Mario Munoz, Aamir Shahzad, Kaiwen Zhang, Mustapha Ouhimmou. IEEE ICBC 2021. Acceptance rate: 18.0%.
  • Privacy-Preserving Smart Grid Traceability using Blockchain over IoT Connectivity
    Aamir Shahzad, Kaiwen Zhang, Abdelouahed Gherbi. ACM SAC 2021.
  • BlockEV: Efficient and Secure Charging Station Selection for Electric Vehicles
    Syed Muhammad Danish, Kaiwen Zhang, Hans-Arno Jacobsen, Nouman Ashraf, Hassaan Khaliq Qureshi. IEEE Transactions on Intelligent Transportation Systems.
  • Analysing the Benefit of Selfish Mining with Multiple Players
    Shiquan Zhang, Kaiwen Zhang, Bettina Kemme. IEEE Blockchain 2020. Acceptance rate: 16.0%.
  • On Delivery Guarantees in Distributed Content-Based Publish/Subscribe Systems
    Pooya Salehi, Kaiwen Zhang, Hans-Arno Jacobsen. ACM Middleware 2020. Acceptance rate: 25.2%.
  • Selective Auctioning using Publish/Subscribe for Real-Time Bidding
    Sonia Slimani, Kaiwen Zhang. WEBIST 2020.
  • Intuitive Development to Examine Collaborative IoT Supply Chain System Underlying Privacy and Security Levels and Perspective Powering through Proactive Blockchain
    Aamir Shahzad, Kaiwen Zhang, Abdelouahed Gherbi. MDPI Sensors.
  • A Theoretical Model for Block Propagation Analysis in Bitcoin Network
    Yahya Shahsavari, Kaiwen Zhang, Chamseddine Talhi. IEEE Transactions on Engineering Management.
  • Monetization using Blockchains for IoT Data Marketplace
    Wiem Badreddine, Kaiwen Zhang, Chamseddine Talhi. IEEE ICBC 2020. Acceptance rate: 22.0%.
  • Securing the LoRaWAN Join Procedure using Blockchains
    Syed Muhammad Danish, Marios Lestas, Hassaan Khaliq Qureshi, Kaiwen Zhang, Waqar Asif, Muttukrishnan Rajarajan. Springer Cluster Computing Journal.
  • BlockAM: An Adaptive Middleware for Intelligent Data Storage Selection for Internet of Things
    Syed Muhammad Danish, Kaiwen Zhang, Hans-Arno Jacobsen. IEEE DAPPS 2020. Acceptance rate: 13.6%. Best Paper Award.
  • Linearize, Predict and Place: Minimizing the Makespan for Edge-based Stream Processing of Directed Acyclic Graphs
    Shweta Khare, Hongyang Sun, Julien Gascon-Samson, Kaiwen Zhang, Yogesh Barve, Anirban Bhattacharjee, Aniruddha Gokhale, Xenofon Koutsoukos. IEEE/ACM SEC 2019.
  • A Theoretical Model for Analysis of Firewalls Under Bursty Traffic Flows.
    Yahya Shahsavari, HadiShahriar Shahhoseini, Kaiwen Zhang, Halima Elbiaze. IEEE Access.
  • A Theoretical Model for Fork Analysis in the Bitcoin Network.
    Yahya Shahsavari, Kaiwen Zhang, Chamseddine Talhi. IEEE BLOCKCHAIN 2019. Acceptance rate: 25.9%.
  • Performance Modeling and Analysis of the Bitcoin Inventory Protocol.
    Yahya Shahsavari, Kaiwen Zhang, Chamseddine Talhi. IEEE DAPPCON 2019. Acceptance rate: 21.8%. Best Paper Award.
  • Scalable Edge Computing Architectures for Low Latency Data Dissemination in Topic-based Publish/Subscribe.
    Shweta Khare, Hongyang Sun, Kaiwen Zhang, Julien Gascon-Samson, Aniruddha Gokhale, Xenofon Koutsoukos. IEEE/ACM SEC 2018.
  • Deconstructing Blockchains: Concepts, Systems, and Insights.
    Kaiwen Zhang, Roman Vitenberg, Hans-Arno Jacobsen. ACM DEBS 2018. Slides: Part 1, Part 2.
  • Multi-client Transactions in Distributed Publish/Subscribe Systems.
    Martin Jergler, Kaiwen Zhang, Hans-Arno Jacobsen. IEEE ICDCS 2018. Acceptance rate: 20.0%.
  • Towards Dependable, Scalable, and Pervasive Distributed Ledgers with Blockchains.
    Kaiwen Zhang, Hans-Arno Jacobsen. IEEE ICDCS 2018. Slides: PDF.
  • PopSub: Improving Resource Utilization in Distributed Content-based Publish/Subscribe Systems.
    Pooya Salehi, Kaiwen Zhang, Hans-Arno Jacobsen. ACM DEBS 2017. Acceptance rate: 23.0%.
  • Incremental Topology Transformation for Publish/Subscribe Systems Using Integer Programming.
    Pooya Salehi, Kaiwen Zhang, Hans-Arno Jacobsen. IEEE ICDCS 2017. Acceptance rate: 16.9%.
  • Efficient covering for top-k filtering in content-based publish/subscribe systems.
    Kaiwen Zhang, Mohammad Sadoghi, Vinod Muthusamy, Hans-Arno Jacobsen. ACM Middleware 2017. Acceptance rate: 24.0%.
  • Shared dictionary compression in publish/subscribe systems.
    Christoph Doblander, Tanuj Ghinaiya, Kaiwen Zhang, Hans-Arno Jacobsen. ACM DEBS 2016.
  • Minimizing the Communication Cost of Aggregation in Publish/Subscribe Systems.
    Navneet Kumar Pandey, Kaiwen Zhang, Stéphane Weiss, Hans-Arno Jacobsen, and Roman Vitenberg. IEEE ICDCS 2015. Acceptance rate: 13.0%.
  • Publish/Subscribe Network Designs for Multiplayer Games.
    César Cañas, Kaiwen Zhang, Bettina Kemme, Jörg Kienzle, and Hans-Arno Jacobsen. ACM Middleware 2014. Acceptance rate: 18.75%.
  • Distributed Event Aggregation for Content-based Publish/Subscribe Systems.
    Navneet Kumar Pandey, Kaiwen Zhang, Stéphane Weiss, Hans-Arno Jacobsen, and Roman Vitenberg. ACM DEBS 2014. Acceptance rate: 9.0%.
  • Distributed Ranked Data Dissemination in Social Networks.
    Kaiwen Zhang, Mohammad Sadoghi, Vinod Muthusamy, and Hans-Arno Jacobsen. IEEE ICDCS 2013. Acceptance rate: 13.0%.
  • Total Order in Content-based Publish/Subscribe Systems.
    Kaiwen Zhang, Vinod Muthusamy, and Hans-Arno Jacobsen. IEEE ICDCS 2012. Acceptance rate: 13.0%.
  • Transaction Models for Massively Multiplayer Online Games.
    Kaiwen Zhang, Bettina Kemme. IEEE SRDS 2011.

Professional Service (PI)

  • General Co-Chair for ACM Middleware 2022.
  • General Co-Chair for ACM Middleware 2021.
  • General Co-Chair for ACM DEBS 2020.
  • Proceedings Chair for ACM Middleware 2019.
  • Posters & Demos Co-Chair for ACM DEBS 2017, 2019.
  • Doctor Symposium Co-Chair for ACM DEBS 2018.
  • Workshop Chair for Blockchains and DLTs, SACMAT 2019.
  • Workshop Co-Chair for "Events Meet Processes", DEBS 2017.
  • Publicity Chair for Active Workshop, ICDE 2017, Middleware 2017.
  • PC Member for IEEE ICDCS 2018-21.
  • PC Member for ACM DEBS 2017-21.
  • PC Member for IEEE ICCCN 2021-22.
  • PC Member for IEEE IC2E 2021.
  • PC Member for Blockchain Congress 2021.
  • PC Member for ACM 6G-ABS 2021.
  • PC Member for Blockchain Forum BPM 2021.
  • PC Member for IEEE Blockchain 2020-21.
  • PC Member for IEEE DAPPS 2019-21.
  • Reviewer for IEEE, ACM, Elsevier, MDPI, Springer, PeerJ.
  • Reviewer for NSERC, MITACS, PROMPT, FNR (Luxembourg) Grants.
  • Committee Member for CAC/ISO/TC307: Blockchain and electronic distributed ledger technologies (SCC).

Courses Offered

Join our group

We are looking for highly motivated students interested in systems research. Our research focuses mostly on industrial use cases, formulating theoretical problems based on practical applications, designing and implementing solutions, and evaluating them in a system testbed. Note that while classes are given in French at ÉTS, it is possible to conduct research and write the thesis in English or French. Classes may also be taken at other universities, including English-speaking ones. For more information on the graduate programs, please consult the ÉTS website. If interested, please send your CV and a statement of research interests to Dr. Kaiwen Zhang.

Current openings

  • General position openings: PDF.