4th International Workshop on
Cryptocurrencies and Blockchain Technology - CBT 2020

September 17-18, 2020, Surrey, UK.
  In conjunction with ESORICS 2020 and DPM 2020.


Deadline (Papers):
July 10, 2020
July 25, 2020 (Firm)

August 20, 2020
(already sent)

September 1st, 2020

CFP 2020

LNCS Proceedings





The final program is already available.

COVID-19 Update

After assessment of the COVID-19 Pandemic, the ESORICS 2020 Organizing Committee has made the decision to move the conference and all associated workshops to an online format. Arrangements for the virtual format are being made and we will post updates as they are announced. This new format will not affect our proceedings, which will be published as Springer LNCS proceedings.

Aims and Scope

Since the appearance of Bitcoin in 2009, a plethora of new cryptocurrencies and other blockchain based systems have been deployed with different success. While some of them are slightly different copies of Bitcoin, other ones propose interesting improvements or new usages of the underlying blockchain technology. However, the novelty of such technologies is often tied with rapid developments and proof-of-concept software, and rigorous scientific analyses of the proposed systems are often skipped.

This workshop aims to provide a forum for researchers in this area to carefully analyze current systems and propose new ones in order to create a scientific background for a solid development of new cryptocurrencies and blockchain technology systems.


The main topics include (but are not limited to):

Program Commitee

PC Chairs:

Joaquin Garcia-Alfaro, Télécom SudParis, France
Email: joaquin.garcia_alfaro [at] telecom-sudparis [dot] eu

Jordi Herrera-Joancomarti, Universitat Autonoma de Barcelona, Catalonia
Email: jordi.herrera [at] uab [dot] cat

PC Members:
Daniel Augot - INRIA Saclay (France)
Alex Biryukov - University of Luxembourg (Luxembourg)
Rainer Böhme - Universität Innsbruck (Austria)
Joseph Bonneau - NYU (USA)
Alexander Chepurnoy - IOHK Research (Russia)
Mauro Conti - University of Padua (Italy)
Vanesa Daza - Universitat Pompeu Fabra (Catalonia)
Sergi Delgado-Segura - UCL (UK)
Joaquin Garcia-Alfaro - Télécom SudParis (France)
Arthur Gervais - Imperial College London (UK)
Hannes Hartenstein - KIT (Germany)
Jordi Herrera-Joancomarti - Universitat Autonoma de Barcelona (Catalonia)
Ghassan Karame - NEC Research (Germany)
Eleftherios Kokoris-Kogias - EPFL (Switzerland)
Shin'ichiro Matsuo - Georgetown University (USA)
Andrew Miller - University of Illinois at Urbana-Champaign (USA)
Pedro Moreno-Sanchez - TU Wien (Autria)
Guillermo Navarro-Arribas - Universitat Autonoma de Barcelona (Catalonia)
Cristina Pérez-Solà - Universitat Oberta de Catalunya (Catalonia)
Matteo Signorini - Nokia Bell Labs (France)
Khalifa Toumi - SystemX (France)


We are pleased to announce that Sergi Delgado will be our keynote speaker.

Speaker: Sergi Delgado, CEO of Talaia Labs.
Title: Design tradeoffs for Bitcoin Watchtowers
(joint keynote with the DPM workshop)
Date: September 17

Abstract: Bitcoin layer 2 protocols, such as the Lightning Network, introduce some additional assumptions to the security model of the system. One of the most important ones is the always-online assumptions, meaning that the nodes of the network require to remain always online (or at least reconnect periodically) in order to prevent potential loss of funds. Watchtowers were introduced to reduce that assumption, acting as non-trusted, non-custodial third party relayers. While this is generally the case, some protocols may do with less strict requirements. In this talk we will cover the different tradeoffs in watchtower design, ranging from storage requirements to privacy concerns.

Short Biography: Sergi Delgado is the CEO of Talaia Labs. He got his PhD in CS from the Autonomous University of Barcelona (UAB) focusing on Bitcoin and Distributed Systems. In the past he has worked in the blockchain laboratories at both UCL and UIUC. He co-founded and led the Bitcoin development at PISAResearch. His recent research has focused on measuring (and inferring) the Bitcoin peer-to-peer network which was presented at Financial Cryptography (18 & 19) and Scaling Bitcoin (18 & 19). He is currently building a watchtower protocol for Bitcoin.

CBT 2020 Program

[Final PDF Program]



Session 1: Transactions, Mining & Second Layer

Session 2: Signature Schemes & Formal Methods

Session 3: Privacy, SNARKs & Anonymity


The workshop will be held in collaboration with ESORICS 2020.

More information about the venue is available here.


The information about the registration to CBT 2020 is available at the ESORICS 2020 website.

Registration costs: £25 per person, including access to all sessions of the conference and workshops.

Kindly use this link to register.