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Author: Julien Prat

Outlook Crypto in France
Outlooks

Crypto in France: Structuring of the Sector and Adoption by the General Public

The Blockchain & B2B Platforms Chair at Ecole Polytechnique aims to combine academic excellence with institutional and scientific prestige in order to foster innovation in blockchain. Pioneer in its field and supported by Capgemini, Nomadic Labs and Caisse des Dépôts, is proud to have supported the production of this study conducted by KPMG France for the ADAN Association on the French and Crypto.

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2022-03-18
Publications

Proceedings of Tokenomics 2020

Tokenomics is an international forum for theory, design, analysis, implementation and applications of blockchains and smart contracts. The goal of the conference is to bring together economists, computer science researchers and practitioners working on blockchains in a unique program featuring outstanding invited talks and academic presentations.

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2021-11-01
Publication Tokens and Icos a Review of the Economic Literature | Blockchain@X
Publications

Tokens and Icos : a Review of the Economic Literature

Tokens and ICOs: A review of the Economic Literature, with Andrea Canidio, Vincent Danos and Stefania Marcassa, This article is a part of Principles of Blockchain Systems, Synthesis Lectures on Computer Science, 2021, Vol. 9, No. 2 About the book This book is the first to present the state of…

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2021-10-01
Publication multi client inner product oracle model | Blockchain@X
Publications

Multi-client Inner-product Functional Encryption in the Random-Oracle Model

Multi-client functional encryption (MCFE) is an extension of functional encryption (FE) in which the decryption procedure involves ciphertexts from multiple parties. In this paper, we consider MCFE schemes supporting encryption labels, which allow the encryptor to limit the amount of possible mix-and-match that can take place during the decryption. This…

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2021-02-01
Publication Fundamental Pricing Utility Token | Blockchain@X
Publications

Fundamental Pricing of Utility Tokens

We propose a framework for the fundamental valuation of utility tokens. Our model endogenizes the velocity of circulation of tokens and yields a pricing formula that is fully microfounded. According to our model, tokens are valuable because they have to be immediately accessible when the services are needed, a requirement…

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2021-02-01
Publication Reversible Composable Contracts | Blockchain@X
Publications

Reversible and Composable Financial Contracts

It is widely believed that financial markets cannot be liquid without centralised processes to manage counterparty risk. We propose an alternative method for liquidity based on reversible and composable contracts run atop a blockchain. Novel instruments for zero-collateral intermediation can be defined.

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2021-02-01
Publication double authentication preventing signatures | Blockchain@X
Publications

Double-Authentication-Preventing Signatures in the Standard Model

A double-authentication preventing signature(DAPS)scheme is a digital signature scheme equipped with a self-enforcement mechanism. Messages consist of an address and a payload component, and a signer is penalized if she signs two messages with the same addresses but different payloads. The penalty is the disclosure of the signer’s signing key…

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2021-02-01
Publication efficient lattice-based inner product | Blockchain@X
Publications

Efficient Lattice-based Inner-product Functional Encryption

In the recent years, many research lines on Functional Encryption (FE) have been suggested and studied regarding the functionality, security, or efficiency. These studies include quadratic FE, multi-client FE, function-hiding FE, dynamic FE and much more. Nevertheless, an open problem on a basic functionality, the single-input inner-product (IPFE), remains: can…

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2021-02-01
Publication Proceedings Tokenomics 2019 | Blockchain@X
Publications

Proceedings of Tokenomics 2019

Tokenomics is an international forum for theory, design, analysis, implementation and applications of blockchains and smart contracts. The goal of the conference is to bring together economists, computer science researchers and practitioners working on blockchains in a unique program featuring outstanding invited talks and academic presentations.

Read More »
2020-09-01