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A Non-interactive Range Proof with Constant Communication

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Rethinking the Design of Distributed Stream Processing Systems

Karl Aberer, Ali Salehi

In this paper, we present a novel architecture to support large scale stream processing services in a widely distributed environment. The proposed system, COSMOS, distinguishes itself by its loose coupling and communication efficiency. To exploit the shari ...

IEEE Computer Society2008

Efficient Protocols for Set Membership and Range Proofs

Rafik Chaabouni

We consider the following problem: Given a commitment to a value σ, prove in zero-knowledge that σ belongs to some discrete set Φ. The set Φ can perhaps be a list of cities or clubs; often Φ can be a numerical range such as [1, 220]. This problem arises in ...

Springer2008

Investigating Automatic Dominance Estimation in Groups From Visual Attention and Speaking Activity

Daniel Gatica-Perez, Jean-Marc Odobez, Silèye Oumar Ba, Dinesh Babu Jayagopi

We study the automation of the visual dominance ratio (VDR); a classic measure of displayed dominance in social psychology literature, which combines both gaze and speaking activity cues. The VDR is modified to estimate dominance in multi-party group discu ...

2008

Evolutionary Conditions for the Emergence of Communication in Robots

Dario Floreano, Stéphane Magnenat, Laurent Keller, Sara Mitri

Information transfer plays a central role in the biology of most organisms, particularly social species [1, 2]. Although the neurophysiological processes by which signals are produced, conducted, perceived, and interpreted are well understood, the conditio ...

2007

Broadcast, relay and feedback in Gaussian channels

Sibi Raj Bhaskaran Pillai

Network information theory explores the fundamental data transport limits over communication networks. Broadcasting and relaying are two natural models arising in communication contexts where multiple users share a common communication medium. Number of re ...

EPFL2007

Advances in the Design and Implementation of Group Communication Middleware

André Schiper, Sergio Mena, Olivier Rütti, Rachele Fuzzati, Daniel Bünzli

Group communication is a programming abstraction that allows a distributed group of processes to provide a reliable service in spite of the possibility of failures within the group. The goal of the project was to improve the state of the art of group commu ...

Springer Berlin Heidelberg2006

Considerations on the design of cut-and-cover tunnels

Aurelio Muttoni, Laurent Vulliet, Vincent Labiouse, Sylvain Plumey

The communication shows an alternative for introducing soil-structure interaction in the analysis of cut-and-cover tunnels. An uncoupled method is illustrated through two examples representative of the situations found in practice. The main features of eac ...

ELU-ULS 2006 - Symposium international sur les états limites ultimes des ouvrages géotechniques2006

Efficient secure aggregation in VANETs

Jean-Pierre Hubaux, Maxime Raya, Adel Aziz

In VANETs, better communication efficiency can be achieved by sacrificing security and vice versa. But VANETs cannot get started without either of them. In this paper, we propose a set of mechanisms that can actually reconcile these two contradictory requi ...

2006

Dependable Systems

André Schiper

Improving the dependability of computer systems is a critical and essential task. In this context, the paper surveys techniques that allow to achieve fault tolerance in distributed systems by replication. The main replication techniques are first explained ...

Springer Berlin Heidelberg2006

Dynamic group communication

André Schiper

Group communication is the basic infrastructure for implementing fault-tolerant replicated servers. While group communication is well understood in the context of static groups (in which the membership does not change), current specifications of dynamic ...

Springer Verlag2006