Thesis Defense “Governing the Commons in Blockchains”

Speaker : Yackolley Amoussou-Guenou
UPMC - Sorbonne Université
Date: 08/10/2020
Time: 3:00 pm - 6:00 pm


Blockchains are one of most appealing technologies over the last years,
both for scientists and for the general public. Blockchains are
distributed ledgers that aim to offer transparency, integrity and many
more advantages over their centralised counterparts. Blockchains were
“revealed” and became popular thanks to the creation and raise of the
cryptocurrency Bitcoin. Over the years, blockchain technologies become
more and more popular with an exceptional peak in 2017. Blockchains are
becoming mainstream technologies, as there is an observatory for
blockchains established by the European Commission, blockchain forums in
many countries, blockchain start-ups are flourishing, scientific
conferences are discussing the topic, and even some scientific
conferences are now specifically dedicated to the technology, etc.
The blockchain technology promises, thanks to its integrity and
transparency properties to be useful and interesting in various domains,
and not only for financial systems. However, many questions and doubts
float around it. Is it environmentally viable? Is the technology even
ensuring its promises? Can they be used in real life settings, etc.
In this thesis, using the lens of distributed systems, we study and
defined the properties of committee-based blockchains and their
fairness; that definition allows formalising and helping correct one of
the most used blockchain of that class. Furthermore, adding lenses from
game theory, we propose a methodology to analyse the rational behaviours
of participants in a blockchains system. Using that methodology, we
show, under different mechanism of rewards, the necessary conditions
needed to ensure the blockchain properties.

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ID de réunion : 818 1955 3516
Code secret : 2020/10/08