Pascal Berthomé

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This paper presents a new decomposition technique for hierarchical Cayley graphs. This technique yields a very easy implementation of the divide & conquer paradigm for weak order problems on very complex architectures as the Star graph or the Pancake. As applications, we introduce asymptotically optimal algorithms for Broadcasting, Gossiping, and Semigroup(More)
To ensure the privacy of users in transport systems, researchers are working on new protocols providing the best security guarantees while respecting functional requirements of transport operators. In this paper 1 , we design a secure NFC m-ticketing protocol for public transport that preserves users' anonymity and prevents transport operators from tracing(More)