Paris P2P Festival #2, Apr 9- 11th, 2025 - Ground Control, Paris. Everything you want to know about Peer-to-Peer, with talks, workshops, movies, performances, and more.

Paris P2P Festival #2

Past Events

Speakers

Olivier Bégassat

What are ZK-EVMs? Zero-knowledge & EVM: What is the state of play in the ecosystem? What progress has been made recently? What are the perspectives on these protocols for the future of privacy?

ZK-EVM, overview and progress

Arthur Bard

France Barter: a marketplace between businesses. Purchase without money within a community of peer businesses.

France Barter

Alexandre Vinot

Why is it important to continue decentralizing the security of Bitcoin? How can we enable the general public to participate in the security of the network, while creating new incentives to do so?

Earn Bitcoin while heating your home

Gilles Cadignan

Bitcoin is a clock.
Simple, robust, and secure, the Bitcoin protocol is used in many different contexts to time-stamp documents.
Why is Bitcoin a security tool for certain data?

Bitcoin Data Security

Vladimir Oustinov

Open question and answer, with the 3 founders of these Web3 companies, and on their strategic approaches to the decentralization of organizations.

Introduction by Vladimir Oustinov to present Jericho & the topic of the evening.

Jericho Community and Spectrum of Organization Decentralization

Alice

Workshop on the future of SOLID specifications. In French. Offered by Alice and the Digital Commons Consortium.

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Workshop on Future SOLID Specifications

Aurelio LostGroove

"Soulful Music for Smiling People"

Funk/Soul/Disco/Boogie/House/Jazz/Hip-Hop/Afro/Breaks/Beats

DJ Set - Aurelio LostGroove

Alexandre Doussot

Introduction to Michelson and to higher level language Ligo, used in an example of a voting app, that we will study together.

Bring your laptop with Linux or OSX, Docker and Python 3.

Useful links:
https://ligolang.org/
https://gitlab.com/kinokasai/proposals-vote/blob/abate-cleanup/src/contracts/mono_vote.ligo
https://gitlab.com/kinokasai/proposals-vote

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How to Develop Smart Contracts with Tezos

Nelson Melina

Aeternity has developed a functional programing language for smart contracts called Sophia, a "dialect" of Reason ML. To help developers get into It, we have created a remunerated online course($75 in AE). Participants to the worshop will receive a link to get access to It. At the end of the course there is a "Challenge": students have to sucessfully modify a voting Daepp.

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Workshop on Aeternity and its functional programming language, Sophia

Sébastien Rannou

How to correlate GPS positions at scale (Covid)

Geo Backtracker by Sébastien Rannou

Brian O'Hagan

Level: beginner and intermediate. No technical knowledge is required, this workshop is intended for newcomers who wish to discover and interact with the Ethereum ecosystem. We will give you the best practices and everything you need to get off to a good start in this high-potential ecosystem.

What to bring :

- A laptop, with a web browser (Google Chrome or Brave required)
- Writing materials (pen & paper)

In this introductory workshop you will :

- A quick introduction on Ethereum will be given by the speaker.
- You will create an Ethereum portfolio.
- We will supply them and analyse what happens when a transaction takes place.
- We will interact with several smart-contracts to perform various transactions.
- We will create a personalized name for your Ethereum account.
- We will teach you how to interact with real Dapps (decentralized applications).
- A panorama of interesting Dapps will be presented to you.

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Learn how to interact with smart-contracts on Ethereum

PoC Innovation

In this workshop, we will see how to implement Merkle Proof by deploying our Solidity contracts and verify their validity with Merkle Proof Typescript without having all the chain history.

Merkle Proofs help us save gas and memory during our smart contract execution

Use Merkle Tree for Smart Contract Auth

Manel Ruiz

Manel Ruiz and Nelson Melina from Aeternity will present the improvements done since the release of the Aeternity Mainnet one year ago. He will explain how State Channels work on Aeternity, how to set up an Oracle and the Aeternity Naming system. Also, he will present the Aeternity incubation program, which supports developers willing to create Daepps on Aeternity

Aeternity: Scalable smart contracts interacting with real world information

Aeternity: scalable smart contracts + oracle machine

Jonas Smedegaard

Keep your knowledge in your home. Share some parts with friends and family as you like, and maybe publish some of it for all to see.

Solidbox is an alternative to putting trust in service providers. Instead you run internet services yourself - without technical challenges but similar to a fridge or a wifi box: Cheap and dead simple to use!

Under the hood, Solidbox runs one of the oldest and most serious operating systems, Debian GNU/Linux, and among the included services are both conventional things like Jabber chat and a simple web hosting, as well as a set of <a href="https://solid.mit.edu/">Solid services</a> for efficient and flexible data sharing both with humans and with other similar systems.
Solidbox is a <a href="https://wiki.debian.org/Solidbox">Free software</a> project developed as an <a href="https://wiki.debian.org/DebianPureBlends#PureBlend">integral part of Debian</a>.

Introduction to SOLID BOX

Zdeadex

The Cosmos ecosystem is relatively unknown to the general public, yet it is now entering an acceleration phase with a wide variety of chains using Tendermint & IBC. How is this ecosystem taking shape? How does a node on Cosmos work?
What does it mean to be a validator node within the ecosystem? Why participating in decentralization is important.

How to manage a Validator Node on Cosmos Network

François Branciard

Are you interested in the development of blockchain or P2P services on decentralized infrastructures? Come and discover tools that facilitate the bootstrap and deployment of your projects.

We will present our Archipel project, to illustrate the use of these helping technologies: DAppNode and Parity Substrate framework.

Archipel: High availability for blockchain services with DAppNode and Substrate

Vladimir Ostapenco

Virgile Deville

How can the civic tech ecosystem deliver shared governance platforms that foster real democratic participation in a wide range of communities? To answer that question, Virgile and Nicholas look at what can be learned from web 2 use cases in digital governance to build the transition of participatory democracy into a web 3 decentralised public space infrastructure.

Blockchain x participatory democracy: transitioning civic tech into web 3

Mayflo

Mayflo is a producer, drummer, DJ and radio host from Paris. He explores a vast sonic universe, ranging from the most Soulful tunes and the brightest bangers to the strangest corners of Club, Electronic and Bass Music -and everything in between-

DJ Set - Mayflo

Mathilde Imer

For the first time, an experiment in participatory democracy is taking place in France at the national level. Mathilde Imer, member of the governance committee of the Citizen's Convention for the Climate on behalf of Citizens' Vests and Open Democracy, comes to tell us how this story is being constructed, at the very moment when the confrontation and mistrust between the institutions of power and the people is reaching a climax.


Citizenship Convention for the Climat: we'll tell you everything about the first direct democracy experiment in France

Marten Seeman

We’ll take a closer look at the recently added decentralized hole punching feature, allowing NAT and firewall traversal without the need for any central coordination servers (STUN and TURN).

Hole punching with libp2p

What is the future of libp2p within the Browser? What about WebRTC, WebTransport, WebSockets in the future?

Challenges in Browser Connectivity. An Outlook onto libp2p’s Future: WebRTC, WebTransport, WebSockets

Rand Hindi

As the world became more digital, the amount of data collected about people increased exponentially, leading to an unprecedented amount of data breaches and privacy infringements. But thanks to modern encryption, it is now possible to leverage the power of AI without ever compromising user privacy and data security. 

Protecting our Privacy in the age of AI

Jorropo

Jorropo will give the keys to understand IPFS and what are the various steps that make the lifecycle of a "file"

IPFS from A to Y

Manfred Touron

Manfred Touron is the founder of Berty Technologies, an NGO that develops the open source protocol Berty. 
Through the Berty project, it is not only about a messaging application, but about a set of challenges that humanity is facing.
How to develop common tools to defend privacy, and resistance to censorship? A vision of the future for Berty and its open ecosystem.

Berty Protocol & Berty’s non-profit org - Current state & Berty’s vision of the Commons for Privacy

Slides: <a href="https://manfred.life/history-p2p-presentation">here</a>

History and current state of P2P

Hello, world!

Last news from the Berty project + Code & Community openings

Pathwar.land is an open-source platform for teaching cybersecurity, using challenges and ruthless competition between players. It's free and open to all!

Discovery of the Cybersecurity learning platform: Pathwar

The results of the Hackathon of the last 3 days, with the discovery of the different winners by the jury & partners! 

Hackathon Winners Announcement

Many developers have misconceptions about open source collaboration. Being a bit shy and afraid to make a mistake is a frequent reason for not contributing, and so is just not knowing about how to start. This talk will share lessons learned about open collaboration, both for project leads and independent contributors.

How to Join and Contribute to Open Source Communities, by Manfred Touron

Hello, world

Launch of the Hackathon!
Proposed by Protocol Labs, IPFS, Filecoin, Fluence Network, Aleph.im & Starton, this hackathon will offer participants to take on different challenges and side quests.
Open to all, these challenges are open to teams of all levels curious to discover new technical stacks! Mentors will be available to help you get to grips with the tools, and build something!
Cash prizes are to be won by the most deserving!


P2P Hackathon Kick-Off

@Moul, founder of Berty.tech and his team will introduce IPFS and share lessons learned while building their technology. Berty.tech has won the OMG Feature Award at the IPFS Camp 2019 in Barcelona.
Berty is an NGO dedicated to building technology for protecting individuals, journalists, whistleblowers and citizens from any form of censorship and surveillance.

Mainstream Introduction to the Berty Protocol

Nicholas G.S. Saul

Mamie Crypto

@LesHackeuses and friends support women in their effort to play a bigger part within the blockchain ecosystem.

Introduction to blockchains and cryptocurrencies by the @LesHackeuses collective

This workshop will teach you how to install and create a wallet on your device.

Introduction to Crypto Wallet

Evgeny Ponomarev

Fluence is a decentralized platform designed to enable the freedom of digital innovation via peer-to-peer applications.
How does it work? How could it be useful for developers? How to join builders on this network? What can we imagine in the future?

Fluence Protocol - A P2P Computing Protocol, co-founder

Lionel Maurel

Public Domain Day - Outlook 2020 on Open Science and Open Education

Célya Gruson-Daniel

Alexis Michaud

Fabien P.

Fabien P. will quickly present the basics of reverse engineering with a playful presentation of the logics of "Reverse Engineering". This conference is intended for developers and the curious, who want to understand the logic, analysis and modification mechanisms of a compiled code during its execution. These logics and tools are of course tools and knowledge that can then be applied to all application developers, as well as to profiles interested in cybersecurity.

Reverse Engineering Basics & Theory

Max Inden

We will discuss the current state of the project, eyeball the various language implementations, take a look at the many live networks running on top of libp2p today and finally cover the project roadmap for the years to come.


 Introduction to and State of libp2p

Louis Giraux

TwoPlus defines itself as a mental fitness club and DAO (Decentralized Autonomous Organization) design.
But what is it?

Twoplus Presentation

Panel with Louis Giraux (Association Aragon), Adrien Berthou (Genesis DAO, PolkaDAO, DAO), Alex Masmej (MetaCartel, Stake DAO, Marketing DAO) - moderated par Philippe Honigman

Panel: Will 2020 be the Year of DAOs?

Antoine Eddi

What is IPFS? How does it work? How can it be used? What is Berty and how did they use IPFS in their project? Lessons learned by Antoine Eddi

Introduction to IPFS and Berty Protocol, by Antoine Eddi

<ul>
<li>IPFS overview</li>
<li>The solutions it provides to decentralize / distribute the web and the issues it faces</li>
</ul>

Web 3.0 with IPFS

Friedger Müffke

In this session, you will learn how to add authentication to web apps that does not require any servers. It will be shown how user-owned storage can be used to exchange and verify data between users, in particular group membership and payment receipts.

React.js and Blockstack.js will be used in this session. 

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Decentralized Login and Storage with Blockstack 

Blockstack is an open source project that allows users to create and control their own digital identity. The identity is blockchain based and follows the standards for decentralized identity (DID) by W3C. With these DIDs users can start to interact with other users, in particular create and validate user-related certificates, so-called Verifiable Credentials.

In this talk, Friedger will give a short introduction to Blockstack and explain how Verifiable Credentials can be used on a p2p basis. 

Blockstack and Verifiable Credentials 

FX Thoorens

ARK Ecosystem is the multistakeholder co-op that created the ARK blockchain. François-Xavier will present both the organization of the co-op and the DPoS-based protocol, including its latest features.

Presentation of the ARK Ecosystem and its most recent developments, by François-Xavier Thoorens 

Presentation by FX Thoorens

François-Xavier Thoorens is a French engineer and cybersecurity expert, having built and worked for many years on distributed protocols.
He presents today a new approach to identity within decentralized protocols, and what could happen in the next years.

New paradigm of identity and privacy at the age of cryptocurrencies and what is next

Fred Zicmama

From single computers to ONE. A quest for the precious.

P2P VS Lords of the Ring

Duniter, Cesium, Silkaj, Duniterpy, ...
Proto-sidechain IPFS: G1sms, G1Tx, G1Tag, ...
G1Machines and how to use them.

DIscovering Ḡ1 Universe

Ḡ1sms+ :: Local Global Banking System.
The free neobank in which bankers are true friends... you actually create money with them! We will demo G1sms, G1Dab, G1Tx terminals, we will show G1Tag, G1 (ZEN) container on IPFS, G1Bot (multichanel) and its internal API, a cashless system based on G1smsn etc..

Fork me, I am famous, a workshop by Fred Zicmama

Fasto

Participative & peer-painting with Fasto - children and adults equally welcomed!

P2P Painting - Experiment Peer-painting with friends

Loïc Titren

Anne Vanet

Benjamin Jean

Rémi Barberro

Berty is an open source protocol for decentralized messaging, which has the particularity to have new drivers allowing offline communications.
How does it work? Where are we with the proximity drivers?

Berty & Offline Communications

Amira Bouguera

Amira Bouguera, cryptographer and Blockchain engineer at Consensys, co-founder of Hellhound, gives an introduction to the p2p network layer of Ethereum, with a focus on RLPx transport protocol

Introduction to networking protocols between Ethereum nodes

Danièle Bourcier

Public Domain Day - Free licenses: lessons learned (Creative Commons, Wikimedia)

Stephan-Eloïse Gras

Pierre-Yves Beaudouin

Anuj Das Gupta

A mysterious talk by a wise man from the East

When is decentralization not a good idea?

Marco Munizaga

Present storetheindex, a distributed and eventually consistent database. Explain what that means, what properties it holds, and how it enables IPFS ↔ Filecoin interop.


Storetheindex, A distributed and eventually consistent database

Gilles Fedak

For more than twenty years, applications based on P2P logic deliver more freedom to their users. From file-sharing to cryptocurrencies, they have revolutionized the way we design distributed systems, at a technical level and beyond. We believe that now is the time for a new wave of P2P systems: decentralized marketplaces. Relying on blockchains, they enable anyone to exchange services and monetize resources with no reliance on a trusted third party. Gilles will share the lessons learned at iExec with respect to the challenges faced when designing and deploying such a decentralized marketplace.

Design and Implementation of a Decentralized Marketplace: Challenges and Lessons Learned

Rémi Crussière

Protocole is plugged to the « cryptosphere », where one can meet users and supporters of Bitcoin and other cryptocurrencies, as well as entrepreneurs and researchers. 

Giving them a voice makes it obvious that Bitcoin as a way of challenging monetary institutions is actually part of larger trend of the society as a whole. Cryptocurrency are not just a new "asset class", but complex and far-reaching social phenomenon. 
The screening will be followed by a Q&A with the director Rémi Crussière.

Protocole - A Documentary About Bitcoin & Cryptocurrencies + Q&A with the director

Adli Takkal Bataille

Adli Takkal Bataille is a French researcher, author and entrepreneur who has been exploring the future of decentralized protocols for many years.
Passionate about Bitcoin, and the emergence of new models of social organization, he presents here a conference aimed at understanding the roles that protocols have played in the history of humanity.

History of Protocols

Bitcoin: the keystone of P2P

Henri Lieutaud

State of the art of ZeroKnowledge Proof protocols and its different facets. What is ZeroKnowledge Proof?  Where are we now? Let's take a look at it.

State of ZKs & ZK rollups 101

Rachel Arnould

Open Food - Food distribution back in the hands of its stakeholders

Loup Theron

After the poster-session about DPOS by @zooma2k18, we’ll try to see how these consensus are implemented in a blockchain.
We will explain the main differences between the various implements.

DPOS under the hood

Jean-François Noubel

Since the rise of civilizations, humankind hasn’t found a way to organize society without centralized power structures. By normalizing thought and social codes, they successfully synchronised the actions of millions and billions of individuals. We call it pyramidal collective intelligence. The global warming, the ultra-concentration of power and wealth, the extractive and patriarchal vision of the world, the anthropocentrism and speciesism prove that pyramidal collective intelligence has reach its limits. Today our species invents technologies and infrastructures that will enable a higher form of collective intelligence, the holomidal collective intelligence, distributed, open source, built on economies that integrate life in all its forms. Which technologies and what inner changes will provoke this transition? Let’s explore this together during our talk.


The World We Want

Dietrich Ayala

 The Browsers & Platforms team at Protocol Labs works on IPFS integration across many deployment environments, with many different collaborators, on various architectures, including even the final frontier... SPACE! We'll share a series of scenarios with examples of what worked, what didn't, and what's still in progress to give you a peek into the P2P future.



Architectural Collisions - Short Stories of Hard Problems Putting IPFS in Strange Places

Guillaume Rouyer

Talk about the PAIR (Project, Actor, Idea, Resource) model and its application to organizational design.


The PAIR model: archipelagos and modes of network organization: Towards a reboot of our social structures

Guilhem Chaumont

Presentation of a market-making infrastructure (data aggregation, pricing & modeling, execution) and the first crypto structured products. 
Since 2018, X-Network has been developing an anonymous cryptography and prop-trading infrastructure for crypto derivatives (futures & options).

Summary of the cryptocurrencies market and the emergence of derivative products.

Dr Sonia Ben Mokhtar

Online services (e.g. search engines, location-based services, video on demand, recommendation engines) require a massive amount of personal data harvested from their users. These data, such as location coordinates or search request history, can reveal highly sensitive user information such as political, religious, or sexual preferences.
I will describe the risks stemming from the use of online services with respect to personal data and I will introduce a prospective approach for personal data protection based on decentralization and the use of hardened CPUs (e.g. Intel SGX). I will focus on two specific applications: Web requests and VOD systems.

Building privacy-preserving online services: application to Web search and video streaming systemse

Esther

Counterfeiting on mobile phones: state espionage

Matthew Schutte

When faced with complex challenges, the problem isn't that we aren't coming up with good answers.  We tend to be great at coming up with answers. The problem is that often, we find ourselves answering the wrong questions.  
This Warm Data Lab should help us pose better questions and will make other sessions richer as a result.
 This Warm Data lab will be a living kaleidoscope of conversation in which participants will explore the Future of Risk in a Changing World through several contextual lenses such as family, culture, technology, ecology, economy and education.

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Warm Data Lab

In this talk, Matthew Schutte from Holochain will discuss the surprising advantages that result from truly peer-to-peer approaches to communication and coordination (whether via technology or personal interaction). The talk will be followed by a highly participatory Question and Answer session.

Paris P2P

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