A technical look at four blockchain technologies for the finance industry

Our full report can be found at https://belem.io/research

The security and robustness guarantees brought by blockchain technology to cryptocurrencies are of particular interest to financial institutions. Blockchain offers the opportunity to rethink financial interactions while improving the security of transactions and lowering operational costs. This study offers a comparison of distributed ledger technologies. It intends to assist decision making within financial institutions wanting to build distributed infrastructures and leverage a technology suited for finance and banking applications.

A blockchain can be understood as a database equipped with specific properties, implemented using cryptography and distributed algorithms. It is typically used to…


The Casper FFG Project

This post is part of a research report conducted by BELEM for Crédit Agricole CIB in December 2018. The full report can be found at https://belem.io/research

We first presented the history of the Ethereum project with regard to the transition to Proof-of-Stake and the Casper project. Now, we will present, from a technical standpoint, the Casper Friendly Finality Gadget (FFG) project. Lastly, we will illustrate the challenges ahead and the next steps of the project.

The idea of switching to a Proof-of-Stake mechanism has been present from the start of the Ethereum project. V. Buterin published many blog posts in…


The Proof-of-Stake problem

This post is part of a research report conducted by BELEM for Crédit Agricole CIB in December 2018. The full report can be found at https://belem.io/research

In a way, the Proof-of-Stake problem can be formulated like this: can we reproduce the algorithmic equivalent of the Proof-of-Work by using algorithms inspired by those used in a private blockchain? …


Introduction to blockchain consensus

This post is part of a research report conducted by BELEM for Crédit Agricole CIB in December 2018. The full report can be found at https://belem.io/research

Read Part 2 & Part 3

The consensus problem emerges in the context of the need to replicate critical computer systems such as databases [Johnson 1975]. The principle is simple: if a critical system can be faulty, then replicating it can serve to tolerate a number of failures of it. This is known as a fault-tolerant system. …


Visualisation d’un noeud BELEM sur le réseau Lightning Network. Voir en live sur https://lnmainnet.gaben.win

Un nouveau protocole Bitcoin pour des transferts ultra-rapides

Une transaction Bitcoin permet le transfert de bitcoins entre membres du réseau Bitcoin. Une transaction contient généralement le montant de bitcoins transférés, l’adresse du destinataire, et surtout la signature de l’émetteur autorisant la transaction. Son inscription dans le registre du Bitcoin (la blockchain) lui confère son caractère officiel.

En réalité, le protocole permet de signer des transactions plus complexes, aussi appelés Bitcoin scripts ou smart contracts. Les transactions spécifient l’adresse du ou des destinataires, mais également les preuves que celui-ci doit fournir pour disposer des bitcoins reçus.

Le Lightning Network (LN) est…


In this piece, we focus on Ethereum Smart contracts and how they can be used in the field of sport forecasting.

At BELEM, we wrote a smart contract in Solidity to manage an open, hopefully secure, mutual betting game. A player inputs its forecast for World Cup games from Group phase to Final. The more accurate the prediction, the more points the player gets. Players in the top 1% split all the pool - more precisely we use a square root function to spice things a bit. A player buys a ticket for a fixed price, but can buy several…


https://copadelcrypto.com

BELEM développe depuis 2015 des solutions blockchain dans des domaines comme la finance, l’assurance, ou encore le notariat. Ces solutions s’appuient sur la blockchain pour permettre une délégation en toute confiance (vérification de règles, horodatage).

Avec la Coupe du monde de football 2018 en ligne de mire, nous nous sommes lancés un défi : développer en moins de deux semaines une application décentralisée de prédiction des résultats de la Coupe du monde.

Ethereum est une plate-forme blockchain qui permet d’héberger des applications décentralisées (DApp), aussi appelées “smart contracts” (des programmes informatiques qui s’exécutent sur la blockchain). …

Jeremy Serror

BELEM / Co-Founder

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