The ID-Fix project aims to improve authentication methods in everyday communication. Usually there is a clash between two worlds at this level, on one hand academic research tends to propose solutions proven secure in some abstract model without real consideration for efficiency, while industrial tends to favor optimization without sufficient concerns for security or the lack thereof, another main issue is that those implementations often tend to consider a Trusted Third Party, and end up relying way too much on its honesty, while no system can be guaranteed no never be corrupted or coerced into evil-doing. This project will take the best of both worlds, by producing protocols secure in model fitting realistic applications, with proper security proof, and practical efficiency. For that, we will undergo a pass on classical interactive protocols, revisit their security model and propose alternative way to achieve the same functionalities, and as much as possible in the ID-based setting.

The emergence process of moving dislocations is characterised by the appearance of steps at the free surface of crystalline materials, with an elementary height equal to the component of the activated dislocation Burgers vector projected on the surface normal, i.e. only few tens of nanometre. Recent developments of scanning probe microscopes, such as atomic force and scanning tunnelling microscopy (AFM and STM), enable nano-scale surface features to be routinely imaged, measured and analysed, even under deformation conditions. A home made device allowing in situ AFM observation of the surface of specimens under deformation has been built at the Laboratoire de métallurgie physique (LMP). Significant experimental results have already been obtained, as for instance concerning the operating mode of Frank-Read sources, individual and collective dislocation movements. This equipment, which is supporting one of the main research topic of the LMP, is however limited to atmospheric working conditions leading to potential surface contaminations and low lateral scanning probe microscopy analysis. These drawbacks restrict the investigations to materials that do not suffer too much from oxidation (such as oxides, superalloys, ionic crystals...). - In this context, the ambitious project that is outlined in this proposal is aimed at developing in situ deformation devices (uniaxial compression and tension set-up and nanoindentation working at variable temperatures) coupled with AFM-STM facilities under UHV environment. This unique UHV experimental equipment especially dedicated to mechanical testing will considerably improve the performances of our existing equipment under atmospheric conditions and gives us a leadership position in the domain of surface plasticity. - From a general point of view, this project intends to answer to one of the main existing objectives in materials science that consists to describe the mechanical properties of materials in terms of their micro-structural defects by relating various length scales of observations, starting from nano- to meso-scale. It is expected that the new experimental results with 3D atomic level resolution will allow a better understanding of basic deformation mechanisms controlling deformation kinetics and will establish the foundation for theoreticians to propose and/or develop more reliable models for describing the plastic response of crystalline materials under stress. ...

Bio-based primary amines represent highly valuable compounds since they can be used as building blocks for various applications. During this project we are intending to design a series of well-defined homogeneous catalysts capable of performing the one-pot amination of bio-based polyols using the borrowing hydrogen methodology. The amination reaction will be performed using ammonia as nitrogen source. The use of the one-pot borrowing hydrogen strategy will provide water as only by-product, allowing this project to meet the requirement of a simple eco-compatible method. This project will be carried out at IC2MP (Institut de Chimie des Milieux et Matériaux de Poitiers).

Plants do not harvest the whole solar spectrum equally at the different wavelengths. They indeed reflect green, absorbs red and blue, so that we see them green. The consequence of that is that the solar spectrum is actually not optimised for energy conversion. However, incoming solar spectrum can be modified in order to shift less efficient wavelengths to more efficient one (like green to red) using fluorescent pigments or phosphors. In this way, photosynthesis efficiency can be increased. Meanwhile, when one uses standard fluorescent pigments implemented in a coating at the top of a greenhouse, half of the converted sunlight is emitted back to space due to their isotropic emission, thus lowering the conversion efficiency. To overcome this limit, we propose to use the properties of nano antennas for which it has been shown that they can change the emitting direction of pigments when they are placed in their vicinity. We will design a greenhouse coating that enhance photosynthesis by increasing the effective light inside greenhouses using coatings having nano-antenna phosphor pairs. Firstly, we will perform numerical calculations considering near field radiation and fluorescence, in order to find an optimum design in terms of antenna and phosphor size. Then, the coating will be produced in collaboration with a deposition facility using corresponding parameters from the numerical study. Finally, the actual design will be characterised using spectroscopy to determine the discrepancy between numerical and experimental study. Further actions like changing numerical solver and/or fabrication methods will be considered after a feedback from the two studies.