DINPS22 10 July 2022 Bologna, Italy ## 10 July 2022 | | | | --- | --- | | 08:30 - 08:45 CEST | Welcome and Logistics | | | | | --- | --- | | 08:45 - 09:45 CEST | Keynote: Towards World-Wide Total Event Ordering - Robbert van Renesse (Cornell University) | | Abstract: The shared log abstraction has proved to be an important building block for distributed systems. It underlies
other key abstractions such as state machine replication, atomic transactions, accountability, stream processing, and
deterministic replay. Shared logs can also play a pivotal role in infrastructure control planes and global service management.
Unfortunately, existing shared log implementations make painful and rather extreme trade-offs between desirable features such
as low latency (both average and tail latency), high throughput, fault tolerance, and consistency properties such as total
and causal order. While some trade-offs are unavoidable, we aim to demonstrate that it is possible to create a worldwide log
by weaving together existing logs. The resulting interlog achieves all the desirable properties at the same time. Some key
insights include separating ordering from storage and ordering events before they happen. | | | | | --- | --- | | 09:45 - 10:45 CEST | Session 1 - Decentralized Networking and Storage | | | | | --- | --- | | 09:45 | Fair Incentivization of Bandwidth Sharing in Decentralized Storage Networks | | Vahid Heidaripour Lakhani (University of Stavanger),
Leander Jehl (University of Stavanger),
Rinke Hendriksen (Ethereum Swarm),
Vero Estrada-Galiñanes (École Polytechnique Fédérale de Lausanne (EPFL)) | | | | | --- | --- | | 10:05 | Passively Measuring IPFS Churn and Network Size | | Erik Daniel (Technische Universität Berlin),
Florian Tschorsch (Technische Universität Berlin) | | | | | --- | --- | | 10:25 | P-KAD: Enriching Kademlia by Partitioning | | João Monteiro (NOVA LINCS & DI-FCT-UNL),
Pedro Ákos Costa (NOVA LINCS & DI-FCT-UNL),
João Leitão (NOVA LINCS & DI-FCT-UNL),
Alfonso de la Rocha (Protocol Labs),
Yiannis Psaras (Protocol Labs) | | | | | --- | --- | | 10:45 - 11:00 CEST | Coffee Break | | | | | --- | --- | | 11:00 - 12:30 CEST | Session 2 - Social economics and tooling for Decentralized Systems | | | | | --- | --- | | 11:00 | Decentralized Technology in Practice: Social and technical resilience in IPFS | | Kelsie Nabben (RMIT University) | | | | | --- | --- | | 11:20 | WAKU-RLN-RELAY: Privacy-Preserving Peer-to-Peer Economic Spam Protection | | Sanaz Taheri-Boshrooyeh (Vac Research and Development, Status Research and Development),
Oskar Thoren (Vac Research and Development),
Barry Whitehat (Unaffiliated),
Wei Jie Koh (Independent),
Onur Kilic (Unaffiliated),
Kobi Gurkan (cLabs) | | | | | --- | --- | | 11:40 | A graph diffusion scheme for decentralized search based on personalized page rank | | Nikolaos Giatsoglou (ITI CERTH, GR),
Emmanouil Krasanakis (ITI CERTH, GR),
Symeon Papadopoulos (ITI CERTH, GR),
Ioannis Kompatsiaris (ITI CERTH, GR) | | | | | --- | --- | | 12:00 | Towards Efficient Decentralized Federated Learning | | Christodoulos Pappas (University of Thessaly),
Dimitrios Papadopoulos (HKUST),
Dimitris Chatzopoulos (UC Dublin),
Eleni Panagou (University of Thessaly),
Spyros Lalis (University of Thessaly),
Manolis Vavalis (University of Thessaly) | | | | | --- | --- | | 12:30 - 14:00 CEST | Lunch Break | | | | | --- | --- | | 14:00 - 14:45 CEST | Keynote: Networking Challenges in the Ethereum Network - Felix Lange (Ethereum Foundation) | | Abstract: Building decentralized systems is hard and often times operating the networking layer over which decentralized
applications run is even harder. Ethereum is one of the largest blockchain networks in operation with countless of applications
building on top of it. This talk will summarise the main building blocks of Ethereum's networking stack, it will discuss the
challenges faced in the process and will point to issues that need further investigation and research. | | | | | --- | --- | | 14:45 - 15:45 CEST | Session 3 - Blockchain, Consensus and Payment Channels | | | | | --- | --- | | 14:45 | Decentralizing Watchtowers for Payment Channels using IPFS | | Hannes Bönisch (Karlsruhe Institute of Technology (KIT)),
Matthias Grundmann (Karlsruhe Institute of Technology (KIT)) | | | | | --- | --- | | 15:05 | Hierarchical Consensus: A Horizontal Scaling Framework for Blockchains | | Alfonso de la Rocha (Protocol Labs),
Lefteris Kokoris-Kogias (IST Austria),
Jorge M. Soares (Protocol Labs),
Marko Vukolić (Protocol Labs) | | | | | --- | --- | | 15:25 | Flash Freezing Flash Boys: Countering Blockchain Front-Running | | Haoqian Zhang (EPFL, CH),
Louis-Henri Merino (EPFL, CH),
Vero Estrada-Galiñanes (EPFL, CH),
Bryan Ford (EPFL, CH) | | | | | --- | --- | | 15:45 - 16:00 CEST | Coffee Break | | | | | --- | --- | | 16:00 - 17:20 CEST | Session 4 - Tutorials | | | | | --- | --- | | 16:00 | Observing Blockchain p2p Networks Through Network Crawlers | | Mikel Cortes-Goicoechea (Barcelona Supercomputing Center),
Leonardo Bautista-Gomez (Barcelona Supercomputing Center) | | | | | --- | --- | | 16:40 | Holium: A Protocol for Data Transformation Pipelines | | Philippe Métais (Polyphene) | | | | | --- | --- | | 16:00 - 17:20 CEST | Session 5 - Demos (in parallel to Tutorials) | | | | | --- | --- | | - | Decentralized Hole Punching | | Marten Seemann (Protocol Labs),
Max Inden (Protocol Labs),
Dimitris Vyzovitis (Protocol Labs) | | | | | --- | --- | | - | Towards Portable Identities in the Matrix Protocol | | Cornelius Ihle (University of Göttingen),
Fabian Deifuß (University of Wuppertal),
Moritz Schubotz (FIZ Karlsruhe),
Bela Gipp (University of Göttingen) | | | | | --- | --- | | - | Waku: A Family of Modular P2P Protocols For Secure & Censorship-Resistant Communication | | Oskar Thorén (Vac Research and Development, Status Research and Development),
Sanaz Taheri-Boshrooyeh (Vac Research and Development, Status Research and Development),
Hanno Cornelius (Vac Research and Development, Status Research and Development) | | | | | --- | --- | | - | Fluence Labs | | TBD | | | | | --- | --- | | - | COD: Compute Over Data | | Wes Flyod (Protocol Labs) | | | | | --- | --- | | 17:20 - 17:30 CEST | Closing Remarks & Hackathon Announcement |