Joan Borrell

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We present in this paper a decentralized architecture to correlate alerts between cooperative nodes in a secure multicast infrastructure. The purpose of this architecture is to detect and prevent the use of network resources to perform coordinated attacks against third party networks. By means of a cooperative scheme based on message passing, the different(More)
A general trust model and security framework for a multi- agent system designed to manage resources in future mobile communications networks is described. The multi- agent system is being developed as part of the IST SHUFFLE project [1]. A business model appropriate for selling of bandwidth resource and services is investigated and mechanisms to achieve a(More)
A solution for obtaining impartial random values in on-line gambling is presented in this paper. Unlike most previous proposals, our method does not require any TTP and allows e-gambling to reach standards of fairness, security an auditability similar to those common in physical gambling. Although our solution is detailed here for the particular case of(More)
Mobile agent systems provide new perspectives for distributed e-commerce applications. Sea-of-Data (SoD) applications are those that need to process huge quantities of distributed data. They present specific restrictions, which make mobile agent systems one of the most feasible technologies to implement them. In this paper we propose a mechanism to safely(More)
Some multiplayer, on-line games rely on the collaboration of all participating players. If a player's gamble is aborted, the rest of players cannot continue playing. This behavior can be used by fraudulent players to avoid paying by simply quitting the game before its completion. It is difficult to decide whether a player has left the game in a deliberated,(More)