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Concept

Moyen de paiement

Publications associées (12)

Dynamic Byzantine Reliable Broadcast

Rachid Guerraoui, Jovan Komatovic, Dragos-Adrian Seredinschi

Reliable broadcast is a communication primitive guaranteeing, intuitively, that all processes in a distributed system deliver the same set of messages. The reason why this primitive is appealing is twofold: (i) we can implement it deterministically in a co ...

Schloss Dagstuhl--Leibniz-Zentrum f{\"u}r Informatik2021

Replicated state machines without replicated execution

Kirill Nikitin

This paper introduces a new approach to reduce end-to-end costs in large-scale replicated systems built under a Byzantine fault model. Specifically, our approach transforms a given replicated state machine (RSM) to another RSM where nodes incur lower costs ...

IEEE2020

Secure Contactless Payment

Serge Vaudenay, Handan Kilinç Alper

A contactless payment lets a card holder execute payment without any interaction (e.g., entering PIN or signing) between the terminal and the card holder. Even though the security is the first priority in a payment system, the formal security model of cont ...

2018

Information Gathering with Peers: Submodular Optimization with Peer-Prediction Constraints

Boi Faltings, Andreas Krause, Goran Radanovic

We study a problem of optimal information gathering from multiple data providers that need to be incentivized to provide accurate information. This problem arises in many real world applications that rely on crowdsourced data sets, but where the process of ...

ASSOC ADVANCEMENT ARTIFICIAL INTELLIGENCE2018

A test of inventory models with permissible delay in payment

Ralf Seifert, Olov Isaksson

Contrary to the long-standing view in the finance literature that firms should maximise payment delays, research in operations management suggests that long payment delays can be suboptimal. In this study, we reconcile these two views by applying a seconda ...

2017

A roadmap for the development of precision medicine

Marie-Valentine Renée Agnès Florin, Gérard Escher

The purpose of the roadmap proposed by IRGC is to recommend a structured process that organisations can follow in their transition towards the development of precision medicine. The process is adaptable, and each organisation should further develop it to a ...

International Risk Governance Center (IRGC)2017

A View on Venetian Apprenticeship through the Garzoni Database

Giovanni Colavizza

A sample of contracts of apprenticeship from three periods in the history of early modern Venice is analysed, as recorded in the archive of the Giustizia Vecchia, a venetian magistracy. The periods are the end of the 16th century, the 1620s and the 1650s. ...

Universitas Studiorum2017

Uniqueness of equilibrium in a payment system with liquidation costs

Damir Filipovic, Léo Hamed Amini

We study a financial network where forced liquidations of an illiquid asset have a negative impact on its price, thus reinforcing network contagion. We give conditions for uniqueness of the clearing asset price and liability payments. Our main result holds ...

Elsevier Science Bv2016

Sound Proof of Proximity of Knowledge

Serge Vaudenay

Public-key distance bounding schemes are needed to defeat relay attacks in payment systems. So far, only five such schemes exist, but fail to fully protect against malicious provers. In this paper, we solve this problem. We provide a full formalism to defi ...

2015

Private and Secure Public-Key Distance Bounding: Application to NFC Payment

Serge Vaudenay

Distance-Bounding is used to defeat relay attacks. For wireless payment systems, the payment terminal is not always online. So, the protocol must rely on a public key for the prover (payer). We propose a generic transformation of a (weakly secure) symmetri ...

Springer2015

Virtual Elevators' Contribution to Sustainable Transport Policies: The Importance of a Smart Regulator and "Not-Too-Smart" Cards

Tristan Chevroulet

The most significant contributions of new technologies to the implementation of sustainable urban travel policies appear to be twofold: a better understanding of users’ behavior, and the improvement of interfaces between operators. Smart cards, i.e. chip c ...

2006

Integrating Direct and Indirect Sales Channels Under Decentralized Decision Making

Ralf Seifert

Many manufacturers have started to use virtual stores as a direct distribution channel in addition to their existing indirect retail channels. These companies must now decide how to integrate these channels. The alternatives are to operate dedicated distri ...

2006

Publications associées (12)

Virtual Elevators' Contribution to Sustainable Transport Policies: The Importance of a Smart Regulator and "Not-Too-Smart" Cards

Tristan Chevroulet

2006

Integrating Direct and Indirect Sales Channels Under Decentralized Decision Making

Ralf Seifert

2006