Vidal Attias
I am a computer science graduate from École normale supérieure (ENS) in Rennes and from MPRI, a highly competitive computer science master from parisian top universities. I am currenlty working as a Junior Researcher for the IOTA Foundation, a leader non-profit institution in the field of DLT (distributed ledger technology).
I have experience in research in blockchain, networking and applied cryptography. I have been working last year on Verifiable Delay Functions (VDF) and low level implementation as well as their integration in the IOTA protocol and have published several papers on the subject. I have experience with theoretical studies, in-depth understanding of multi-precision computing libraries such as OpenSSL and excellent interpersonal skills. I am also highly interested into smart contract implementations, especially at a lower level.
Work Experience
Junior Researcher
IOTA Foundation | 2019 - Present
I am part of the Network team and our goal is to build the networking layer of the IOTA protocol for the Coordicide project.
As part of this team, I have participated in various projects
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VDF Research : I have been investigating the research on Verifiable Delay Functions as a replacement of Proof of Work for the IOTA protocol as a rate control mechanism. This project is also part of a collaboration with the VDF Alliance, a consortium of researchers from Supranational, Ethereum ,Tezos… As a mean of this research, I have built a VDF simulator, studied multiexponentiation algorithms in order to optimize the performances and it has lead to several publications.
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VDF Research : The Network team is currently designing different congestion control algorithms specifically designed for Distributed Ledger Technologies (DLT) constraints and we are investigating a new protocol which ensures security with high throughput. For this we have formally designed an algorithm, developed a simulator and a testing toy network for validation.
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Sharding : I have worked on the sharding solution of the IOTA protocol in which we envision to split the network into a multitude of smaller ones that run concurrently. I helped designing the solution by providing simulations and theoretical computations.
Research Intern
École normale supérieure | Summer 2021
I have worked under the supervision of Pr. David Naccache on different subjects related to blockchain and arithmetic, including a visualization of the Tangle structure from the IOTA
Research Intern
ICube - Strasbourg University | May - August 2018
A two months research internship at ICube laboratory in Strasbourg University for the bachelor. I worked on the IOTA cryptocurrency, especially the Tangle structure behind. I wrote a C++ simulator, designed a new network model, found properties of this model and designed two Tangle compression algorithms.
Report
Publications
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(pending) ACNS'23 Fine-Tuned Verification for Verifiable Delay Functions in Blockchains
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Journal of Cryprographic Engineering Rethinking Modular Multi-Exponentiation in Real-World Applications
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IEEE Transactions on Computers Fast Generation of RSA Keys using Smooth Integers
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IEEE Globecom'20 Preventing Denial of Service Attacks in IoT Networks through Verifiable Delay Functions
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Tokenomics'20 Implementation Study of Two Verifiable Delay Functions
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arXiv:1912.11401 On the Decentralized Generation of the RSA Moduli in Multi-Party Settings
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IOTA Foundation The Coordicide White Paper
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NETYS'19 How To Select its Parents in the Tangle
Projects
Research student project - E-ART: How do we look at paintings?
Percept Team - Inria
A master's degree research project through the whole year where we have investigated how we gaze at art paintings by using eye-tracking technology and machine learning. We created the first database of experimental gaze fixations on paintings and built a model predicting gaze from experimental values.
State of the art - Report
State of the art - Presentation
Contribution - Report
Contribution - Presentation
Student research project in theoretical physics
LPTMS - Université Paris-Saclay
A student project proposed by Haggai Landa, during his postdoc at the LPTMS research center. The objective was to study the cooling of a set of ions in a Paul's trap, based on heavy numerical simulations. This was a great initiation to research and although we hadn't the possibility to finish it, was really intensive.
Presentation
Forest fire simulator
Presented to enter ENS
A forest fire propagation simulator written in Python as a personnal project for my application to the Écoles Normales Supérieures. The aim was to study the behavior of a fire with a basic physical model and a certain amount of parameters.
Report
Non-destructive testing via eddy current
Grandes Écoles exam project
A student research for the competitive exams for the french engineering schools. The aim was to numerically study an impendance change in metal and reacreat numerically a metal environment with a great breach.
Report
Ray Tracing
ENS Programming project
A programmation project at the ENS, the objective was to implement a ray tracing engine with various extensions like shadows, reflexions, complex objects.
Report