Sylvain Ducloyer

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Wireless Sensor Networks (WSNs) consist of spatially distributed autonomous sensors to cooperatively monitor physical conditions. Thus, the node battery autonomy is critical. To outperform it, most WSNs rely on the harvesting capability. As nodes can recharge whenever energy is available, the problem is to determine at design time the node autonomy. For our(More)
— In this paper, we propose a unified architecture adapted to the field of embedded systems which combines commonly used hash algorithms in a single design in order to reduce area requirements and optimize the maximum frequency. We present an implementation of three hash functions: MD5 [8], SHA-1 [9] and SHA-2 [10]. Many similarities exist between these(More)
The design of Wireless Sensor Networks is a challenge, requiring to correctly balancing between performance, time, cost and energy. But the main problem with rechargeable WSNs is to predict at design time which will be the total system autonomy. Moreover, it depends on the energy h arvested from the environment, and we know that weather may be very(More)
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