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<pre>
Preface
This book contains the contributions which were selected for publication at the
fourth edition of the Distributed Ledger Technology Workshop (DLT 2022),
which has been held in conjunction with ITASEC22 in Rome, Italy, on June 20,
2022. This event follows the first three editions of the workshop held at Perugia
in 2018, at Pisa in 2019 and at Ancona in 2020, respectively, and represents the
annual meeting of the Italian DLT group.
    The last years have witnessed an impressive and increasing interest around
Distributed Ledger Technology. A huge number of application fields, including
finance, academics, IoT, industries, just to mention some of the most popular
ones, are experiencing the advantages of reliable and unalterable information
storage and exchange without any trusted third party. This large interest makes
discussion on open problems more pressing, like, for example, regarding privacy,
scalable and low-latency architectures, interoperability, off-chain solutions, legal
aspects, etc. Intersections of blockchains with other technological trends, like,
AI, big data, IoT, Industry 4.0, are further interesting discussion topics.
    The primary goal of DLT2022 was to foster discussion and cross-fertilisation
of ideas among experts in different fields related to DLTs, and thus advance
the international state-of-the-art. Similarly to the previous editions, the DLT
2022 workshop solicited two kinds of contributions: research papers and oral
communications. Both types of contribution entailed an oral presentation at
the workshop, but only the former ones are reported in this book. In particular,
the workshop accepted 10 research papers and 6 oral contributions.
    We would like to express our thanks to the authors who submitted their pa-
pers to the workshop, and to the members of the Technical Program Committee
for their valuable work in evaluating the submitted papers.


                                                                Maurizio Pizzonia
June 2022                                                       Andrea Vitaletti




                                         3
Organizing Committee
Diego Pennino, Università degli Studi Roma Tre
Marco Zecchini, Università degli Studi di Roma ”La Sapienza”


Program Committee
Leonardo Aniello, University of Southampton
Marco Baldi, Università Politecnica delle Marche
Andrea Bracciali, University of Stirling
Francesco Buccafurri, Università degli Studi ”Mediterranea” di Reggio Calabria
Jing Chen, Stony Brook University
Franco Chiaraluce, Università Politecnica delle Marche
Stelvio Cimato, Università degli Studi di Milano
Gabriele D’Angelo, Università di Bologna
Andrea De Salve, Consiglio Nazionale delle Ricerche, Italy
Damiano Di Francesco Maesa, Consiglio Nazionale delle Ricerche, Italy
Changyu Dong, Newcastle University
Stefano Ferretti, Università di Bologna
Letterio Galletta, IMT Scuola Alti Studi Lucca
Alberto Leporati, Università degli Studi di Milano
Michele Marchesi, Università degli Studi di Cagliari
Giorgia Azzurra Marson, NEC Laboratories Europe GmbH
Paolo Mori, Istituto di Informatica e Telematica del CNR
Andrea Morichetta, Università degli Studi di Camerino
Leonardo Mostarda, Università degli Studi di Camerino
Jose Luis Muñoz Tapia, Universitat Politècnica de Catalunya
Guillermo Navarro-Arribas, Universitat Autònoma de Barcelona
Remo Pareschi, Universita’ degli Studi del Molise
Laura Ricci, Università di Pisa
Giovanni Sartor, EUI/CIRSFID
Ivan Visconti, Università di Salerno
Roberto Zunino, Università degli Studi di Trento




                                      4

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