Channel-based key generation for encrypted body-worn wireless sensor networks

Body-worn sensor networks are important for rescue-workers, medical and many other applications. Sensitive data are often transmitted over such a network, motivating the need for encryption. Body-worn sensor networks are deployed in conditions where the wireless communication channel varies dramatically due to fading and shadowing, which is considered a disadvantage for communication. Interestingly, these channel variations can be employed to extract a common encryption key at both sides of the link. Legitimate users share a unique physical channel and the variations thereof provide data series on both sides of the link, with highly correlated values. An eavesdropper, however, does not share this physical channel and cannot extract the same information when intercepting the signals. This paper documents a practical wearable communication system implementing channel-based key generation, including an implementation and a measurement campaign comprising indoor as well as outdoor measurements. The results provide insight into the performance of channel-based key generation in realistic practical conditions. Employing a process known as key reconciliation, error free keys are generated in all tested scenarios. The key-generation system is computationally simple and therefore compatible with the low-power micro controllers and low-data rate transmissions commonly used in wireless sensor networks

« Le meilleur et le pire serviteur de l’humanité » Fer, forges et forgerons à Pompéi

Le fer, outre les vertus magiques et médicinales que lui attribuaient les Anciens, servait autant à la fabrication d’armes qu’à la production d’outils pour l’agriculture, le travail du bois, du cuir, des métaux ou de la pierre. La métallurgie du fer jouait un rôle économique et militaire considérable et occupait une place de choix dans l’artisanat, à tel point que le forgeron est le seul artisan à avoir sa place au panthéon romain sous les traits du dieu Vulcain. Dès la seconde moitié du XIXe..

Cumes

International audienc

Correlation between bovine calpastatin mRNA transcripts and protein isoforms.

absen

Four promoters direct expression of the calpastatin gene.

absen

Cumes

International audienc

Paestum

Greco Emanuele, Cipriani Marina, Rouveret Agnès, Haumesser Laurent, Montel Sophie, Amarger Marie-Pierre, Mousseau Marie-José, Pollini Junior Airton Brazil, Wyler Stéphanie. Paestum. In: Mélanges de l'École française de Rome. Antiquité, tome 118, n°1. 2006. Antiquité. pp. 349-358

Cumes

International audienc

Pompéi, Herculanum (Campanie) et Saepinum (Molise) : recherches sur l’artisanat antique

Brun Jean-Pierre, Borgard Philippe, Monteix Nicolas, Amarger Marie-Pierre, Callis Elodie, Guittonneau Jean-Claude, Leguilloux Martine, Michel Jean-Marie, Sanz Manuel, Tomassone Rémi, Girardot Sophie, Pernot Michel, Célié Marc, Chiaretti Barbara, Coutelas Arnaud, Monaco Virginie. Pompéi, Herculanum (Campanie) et Saepinum (Molise) : recherches sur l’artisanat antique. In: Mélanges de l'École française de Rome. Antiquité, tome 118, n°1. 2006. Antiquité. pp. 362-375