The workshop hosted the following keynote sessions and tutorials:

• "KEYNOTE: Blockchain beyond cryptocurrencies: enabling real-time and data-intensive applications on blockchain" by Fabio Severino, CTO of Traent Srl (traent.com), Italy

• "TUTORIAL: The impact of Distributed ledger Technology on the evolution of electronic voting systems" by Ricardo Daniel Lopes Almeida, University of Pisa/University of Camerino, Italy

Seven (7) papers of the fourteen (14) submitted were accepted for publication, for an acceptance rate of 50%, after 3 reviews each. The authors affiliation of submissions ranged from Japan to the United Kingdom while the affiliation countries of authors of accepted papers and keynotes were:

Accepted Papers

• Smart contracts Analysis

  • Martina Rossini; Mirko Zichichi; Stefano Ferretti. On the Use of Deep Neural Networks for Security Vulnerabilities Detection in Smart Contracts

  • Luca Olivieri; Thomas Jensen; Luca Negrini; Fausto Spoto. MichelsonLiSA: A Static Analyzer for Tezos 

  • Francesco Spegni; Lorenzo Fratini and Massimiliano Pirani; Luca Spalazzi. ChoEn: A Smart Contract Based Choreography Enforcer

  • Chihiro Kado and Naoto Yanai; Jason Paul Cruz; Shingo Okamura. An Empirical Study of Impact of Solidity Compiler Updates on Vulnerabilities

• DLT theory and applications

  • Azam Khan; Ashiq Anjum. Optimizing Data Distribution to Balance Scalability-Redundancy Trade-off in Blockchains

  • Maria Ilaria Lunesu; Roberto Tonelli; Andrea Pinna; Simone Sansoni. Soulbound Token for Covid-19 Vaccination certification

  • Francesco Bruschi; Donatella Sciuto; Tommaso Paulon; Andrea Marchesi. A decentralized approach to award game achievements

The workshop hosted two keynote sessions:

• "Payment Channels" by Matteo Maffei, Full professor, Technical University Wien, Austria

• "Blockchain consensus protocol from Bitcoin to Ethereum 2.0" by Sara Tucci Piergiovanni, Head of Laboratory, Senior Research Engineer at CEA LIST, Gif-sur-Yvette, France

Seven (7) papers of the fourteen (14) submitted were accepted for publication, for an acceptance rate of 50%, after 3 reviews each. The authors affiliation of submissions ranged from Australia to the United States of America while the affiliation countries of authors of accepted papers and keynotes were:

Accepted Papers

• Blockchain Applications

  • Flavio Corradini; Alessandro Marcelletti; Andrea Morichetta; Andrea Polini; Barbara Re; Francesco Tiezzi. A Choreography-Driven Approach for Blockchain-Based IoT Applications

  • Kathy Nguyen; Shantanu Pal; Zahra Jadidi; Ali Dorri; Raja Jurdak.  A Blockchain-Enabled Incentivised Framework for Cyber Threat Intelligence Sharing in ICS

  • Tianyu Li; Jelle Vos; Zeki Erkin. Decentralized Private Freight Declaration & Tracking with Data Validation

  • Francesco Bruschi; Vincenzo Rana; Tommaso Paulon; Donatella Sciuto. A protocol for on-chain tenders

• Blockchain Theory and Analysis

  • Alessandro Brighente; Martina Camaioni; Mauro Conti; Emilio Olivastri. Should I Mine or Should I Break: On the Worthiness of Brute-Forcing Cryptocurrency Addresses

  • Xianning Meng; Hongda Li; Peifang Ni; Haixia Xu. A Conflict-Free Redactable Blockchain

  • Cheick Tidiane Ba; Matteo Zignani; Sabrina Gaito. The role of groups in a user migration across blockchain-based online social media

Five (5) papers of the thirteen (13) submitted were accepted for publication, for an acceptance rate of 38%, after 3 reviews each. The authors affiliation of submissions ranged from Australia to the United States of America while the affiliation countries of authors of accepted papers were:

Accepted Papers

• Blockchain Applications

  • Ahmed Khoumsi (University of Sherbrooke, Canada). An Efficient Blockchain-Based Electric Vehicle Charging Management System

• Principles behind blockchain

  • Matthew C Ding (MIT PRIMES & Westford Academy, USA). An Analysis of Multi-Hop Iterative Approximate Byzantine Consensus with Local Communication

  • Francesco Mogavero (Sapienza University of Rome, Italy); Ivan Visconti (Universita' di Salerno, Italy); Andrea Vitaletti (Sapienza University of Rome, Italy); Marco Zecchini (Sapienza University of Rome, Italy). The Blockchain Quadrilemma: When Also Computational Effectiveness Matters

• Unlocking smart contracts potential

  • Francesco Bruschi (Politecnico di Milano, Italy); Tommaso Paulon (Politecnico di Milano, Italy); Vincenzo Rana (Politecnico di Milano, Italy); Donatella Sciuto (Politecnico di Milano, Italy). A Privacy Preserving Identification Protocol for Smart Contracts

  •  Paolo Bottoni (Sapienza - University of Rome, Italy); Remo Pareschi (University of Molise, Italy); Domenico Tortola (University of Molise, Italy); Nicola Gessa (ENEA, Italy); Gilda Massa (ENEA, Italy). Distributed Ledgers to Support Revenue-Sharing Business Consortia: A Hyperledger-Based Implementation

Eight (8) papers of the twenty-one (21) submitted were accepted for publication, for an acceptance rate of 38%, after 3 or 4 reviews each. The authors affiliation of submissions ranged from Australia to the United States of America while the affiliation countries of authors of accepted papers were:

Accepted Papers

• Bitcoin

  • Liam Hickey and Martin Harrigan. The Bisq DAO: On the Privacy Cost of Participation

  • Muntadher Sallal, Gareth Owenson and Mo Adda. Security and Performance Evaluation of Master Node Protocol in the Bitcoin Peer-to-Peer Network

• Applications

  • Nikita Karandikar, Antorweep Chakravorty and Chunming Rong. RenewLedger : Renewable energy management powered by Hyperledger Fabric

  • Radu Prodan and Nishant Saurabh. Decentralized Social Media Applications as a Service: a Car-Sharing Perspective

  • Diego Pennino, Maurizio Pizzonia, Andrea Vitaletti and Marco Zecchini. Binding of Endpoints to Identifiers by On-Chain Proofs

• Technical proposals

  • Francesco Bruschi, Manuel Tumiati, Vincenzo Rana, Mattia Bianchi and Donatella Sciuto. A Decentralized System for Fair Token Distribution and Seamless Users Onboarding

  • Peter Robinson. Performance Overhead of Atomic Crosschain Transactions

• Analysis

  • Pierluigi Freni, Enrico Ferro and Roberto Moncada. Tokenization and Blockchain Tokens Classification: a morphological framework