Orange S.A.

About: Orange S.A. is a company organization based out in Paris, France. It is known for research contribution in the topics: Terminal (electronics) & Signal. The organization has 6735 authors who have published 9190 publications receiving 156440 citations. The organization is also known as: Orange SA & France Télécom.

A Declarative Approach for QoS-Aware Web Service Compositions

Abstract: While BPEL language has emerged to allow the specification of Web Service compositions from a functional point of view, it is still left to the architects to find proper means to handle the Quality of Service (QoS) concerns of their compositions. Typically, they use ad-hoc technical solutions, at the message level, that significantly reduce flexibility and require costly developments. In this paper, we propose a policy-based language aiming to provide expressivity for QoS behavioural logic specification in Web Service orchestrations, as well as a non-intrusive platform in charge of its execution both at pre-deployment time and at runtime.

Home SOA -: facing protocol heterogeneity in pervasive applications

Abstract: Numerous innovative applications are envisioned in the home area network today, mixing current or nearly marketable applications: multimedia content sharing, home comfort, home surveillance, people care. The home network becomes a ground for pervasive computing design. Its openness to dynamic distributed and heterogeneous devices emphasizes the pervasive challenges in home application design.We present an open architecture for home service development and compare it to related work. Distribution and protocol heterogeneity are managed by service-oriented drivers leveraging the "service platform" concept while network dynamicity is locally reified on the platform. Through some implemented use cases, we show how technological choices and service-oriented patterns facilitate the dynamic composition of distributed and heterogeneous home device services.

On MISTY1 Higher Order Differential Cryptanalysis

Abstract: MISTY1 is a block cipher whose design relies on an assertion of provable security against linear and differential cryptanalysis. Yet, a simplified and round reduced version of MISTY1 that does not alter the security provability can be attacked with higher order differential cryptanalysis. We managed to explain this attack by deriving the attacking property from the choice of an atomic component of the algorithm, namely one of the two MISTY1 S-boxes. This allowed us to classify the good and the bad S-boxes built with the same principles and to show that none of the S-boxes with optimal linear and differential properties has an optimal behaviour with respect to higher order differential cryptanalysis.

Real-time reconstruction of wavelet-encoded meshes for view-dependent transmission and visualization

Abstract: Wavelet methods for geometry encoding is a recently emerged superset of multiresolution analysis which has proven to be very efficient in terms of compression and adaptive transmission of three-dimensional (3-D) content. The decorrelating power and space/scale localization of wavelets enable efficient compression of arbitrary meshes as well as progressive and local reconstruction. Recent techniques based on zerotree compression have shown to be among the best lossy mesh compression methods, while remaining compatible with selective transmission of geometric data at various levels of detail. While some progressive reconstruction schemes have been proposed in the past, we show in this paper that this representation, recently proposed in the MPEG4 standard, can be efficiently used to perform real-time, view-dependent reconstruction of large meshes. The proposed system combines algorithms for local updates, cache management, and server/client dialog. The local details management is an improvement of progressive reconstructions built on top of hierarchical structures. It enables fast, homogeneous accommodation and suppression of wavelet coefficients at any level of subdivision, with time complexity independent of the size of the reconstructed mesh. The cache structure wisely exploits the hierarchical character of the received data, in order to avoid redundant information transmission. The whole system enables the client to have total control on the quality of navigation according to its storage and processing capabilities, whatever the size of the mesh.