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Secure time-stamping schemes: a distributed point of view |
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| Authors: | Alexis Bonnecaze Pierre Liardet Alban Gabillon Kaouther Blibech |
| Affiliation: | 1. département Réseaux et Multimédia, LIF; ESI, Luminy case 925, 13288, Marseille cedex 09, France 2. LATP; UMR CNRS 6632, Université de Provence, 39 rue F Joliot-Curie, 13453, Marseille cedex 13, France 3. CSySEC/LIUPPA, Université de Pau, IUT de Mont de Marsan, Département GTR 371, rue du Ruisseau, BP 201, 40004, Mont de Marsan Cedex, France |
| Abstract: | Time-stamping is a technique used to prove the existence of a digital document prior to a specific point in time. Today, implemented schemes rely on a centralized server model that has to be trusted. We point out the drawbacks of these schemes, showing that the unique serveur represent a weak point for the system. We propose an alternative scheme which is based on a network of servers managed by administratively independent entities. This scheme appears to be a trusted and reliable distributed time-stamping scheme. |
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