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Srdan Capkun

Publications associées (31)

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Mobility Helps Peer-to-Peer Security

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

We propose a straightforward technique to provide peer-to-peer security in mobile networks. We show that far from being a hurdle, mobility can be exploited to set up security associations among users. We leverage on the temporary vicinity of users, during ...

2003

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In this paper we present SECTOR, a set of mechanisms for the secure verification of the time of encounters between nodes in multi-hop wireless networks. This information can be used notably to prevent wormhole attacks (without requiring any clock synchroni ...

2003

We consider the problem of node positioning in ad hoc networks. We propose a distributed, infrastructure- free positioning algorithm that does not rely on GPS (Global Positioning System). Instead, the algorithm uses the distances between the nodes to build ...

2002

Small Worlds in Security Systems: an Analysis of the PGP Certificate Graph

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

We propose a new approach to securing self-organized mobile ad hoc networks. In this approach, security is achieved in a fully self-organized manner ...

2002

Self-Organized Public-Key Management for Mobile Ad Hoc Networks

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

In contrast with conventional networks, mobile ad hoc networks do not provide on-line access to trusted authorities or to centralized servers. For this reason, key management is particularly difficult to implement in such networks. The solutions published ...

2002

A Formal Analysis of Syverson`s Rational Exchange Protocol

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

In this paper, we provide a formal analysis of a rational exchange protocol proposed by Syverson. A rational exchange protocol guarantees that misbehavior cannot generate benefits, and is therefore discouraged. The analysis is performed using our formal mo ...

2002

Small Worlds in Security Systems: an Analysis of the PGP Certificate Graph

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

We propose a new approach to securing computer networks. With this approach, we achieve security in a fully self-organized manner; by this we mean that to secure a computer network, a security system does not require any kind of certification authority or ...

2002

The Quest for Security in Mobile Ad Hoc Networks

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

So far, research on mobile ad hoc networks has been focused primarily on routing issues. Security, on the other hand, has been given a lower priority. This paper provides an overview of security problems for mobile ad hoc networks, distinguishing the threa ...

2001

GPS-free Positioning in Mobile Ad-Hoc Networks

Jean-Pierre Hubaux, Srdan Capkun

In this paper we consider the problem of node positioning in ad-hoc networks. We propose a distributed, infrastructure-free positioning algorithm that does not rely on Global Positioning System (GPS). The algorithm uses the distances between the nodes to b ...

2001

Self-Organization in Mobile Ad-Hoc Networks: the Approach of Terminodes

Jean-Yves Le Boudec, Jean-Pierre Hubaux, Ljubica Blazevic, Levente Buttyan, Srdan Capkun

The Terminodes project is designing a wide area, mobile ad-hoc network, which is meant to be used in a public environment, in our approach, the network is run by users themselves. We give a global description of the building blocks used by the basic operat ...

2001