A Contribution to Secure the Routing Protocol "Greedy Perimeter Stateless Routing" Using a Symmetric Signature-Based AES and MD5 Hash

This work presents a contribution to secure the routing protocol GPSR (Greedy Perimeter Stateless Routing) for vehicular ad hoc networks, we examine the possible attacks against GPSR and security solutions proposed by different research teams working on ad hoc network security. Then, we propose a solution to secure GPSR packet by adding a digital signature based on symmetric cryptography generated using the AES algorithm and the MD5 hash function more suited to a mobile environment

Interaction signatures and action templates in the ODP computational viewpoint

International audienceIn this work we raise two issues that we came across when aiming to formalize both interaction signatures and action templates within the ODP computational viewpoint. We discuss these two concepts and present a way to formalize them by introducing a new term to formal descriptions of interaction signatures. In the same spirit as other works, our aim is to address issues concerning how concepts of the ODP computational viewpoint are currently defined as we present some solutions to their formalisation. If required, our work aim to serve as a step to help improve or change the current process of formalizing the ODP computational viewpoint concepts using the UML language

Towards a refinement of the open distributed systems interactions signatures

International audienceThe ODP framework defines a set of concepts and an architecture for the construction of ODP systems in terms of five viewpoints. The computational viewpoint supports three models of interaction, each of which has an associated kind of computational interface: signals and signal interfaces, flows and stream interfaces, operations and operation interfaces. In this paper we address both the functional decomposition and constraints specification on interactions signatures. We show how to refine an operation signature into a signal signature. And finally, we use OCL to express constraints on interaction signatures refinements. The result is an UML model which can serve as a basis to define end-to-end QoS in open distributed systems, and the operation of multi-party binding and bindings between different kinds of interfaces (e.g. stream to operation interface bindings). That is, QoS require-ments on interactions in the computational viewpoint might be specified just using signals. We are investigating this issue

Contribution à la Sécurisation du protocole de routage ‘’Greedy Perimeter Stateless Routing ‘’ à l'aide de l'algorithme AES et du hachage MD5

Ce travail présente une contribution pour sécuriser le protocole de routage GPSR (Greedy Perimeter Stateless Routing ) pour les réseaux ad hoc véhiculaire, nous examinons dans un premier temps les attaques possibles contre GPSR et les solutions de sécurité proposées par les différentes équipes de recherche travaillant sur la sécurité des réseaux ad hoc. Ensuite, nous proposons une solution pour sécuriser GPSR en ajoutant au paquet GPSR une signature numérique basée sur la cryptographie symétrique générées à l’aide de l’algorithme AES et la fonction de hachage MD5 plus adapté à un environnement mobile

Landslide susceptibility mapping using GIS Matrix Method and Frequency Ratio, application in the marly context of Moulay Yacoub Region, Morocco

In the recent decades, the growth of population, man-made facilities, infrastructures, and lifelines at the expense of landslides-prone areas has been responsible for an exponential increase in human and economic losses in many parts of the world. In the Moulay Yacoub region, where marly hills dominate, the interaction of the semi-urban and rural socioeconomic development and landslides significantly increases, which urges identifying and prioritizing areas of risk in order to maximize harm reduction and to avoid the disastrous outcomes as is the case of Moulay Yacoub town. This paper aims to develop a landslide susceptibility map in a highly affected sector of the province, where no previous landslide data have been produced, and to find the most predisposing parameters. This goal is attained using two robust methods for landslide susceptibility mapping, the Frequency Ratio and the GIS Matrix Method. Before that, the correlation of 11 predisposing factors was tested. The results show that the anthropogenic factors, particularly the agricultural practices, were highly involved, and the field investigations proved that cereal farming slopes are the most affected. The success rate was about 0.75 (75%) for both models showing good quality results for the two susceptibility maps. Therefore, the two models could be efficiently used, and the new agricultural projects located in landslide-prone areas of the province must include such reliable methods of landslide hazard analysis to minimize the risk, which would put human lives, ecosystems, food production, and infrastructure in threat

Resolving the ODP computational viewpoint interaction signatures in terms of action templates using UML

International audienceThe ODP framework defines a set of concepts and an architecture for the construction of ODP systems in terms of five viewpoints. The computational viewpoint supports three models of interaction, each of which has an associated kind of computational interface: signals and signal interfaces, flows and stream interfaces, operations and operation interfaces. Since these concepts are described in natural English language, it is only normal that they could be ambiguous as ambiguity is inherent to all natural languages. In this work we raise two issues that we came across when aiming to formalize both Interaction Signatures and Action Templates within the ODP computational viewpoint. After discussing these two concepts and analyzing their verbal definition, we present a way to formalize them by introducing a new term to their formal descriptions. In the same spirit as other works, the core of ours is addressing issues concerning concepts of the ODP computational viewpoint, and how they are currently defined. As well as we present some coherent solutions to their formalization. When required, our work aim to serve as a step to help improve or change the current process of formalizing the ODP computational viewpoint concepts using the UML language

On embedded QoS aspects in the UML4ODP computational metamodel

International audienceThis work enhances the current UML4ODP FDIS (Use of UML for ODP systems specification, final draft international standard) computational metamodel with QoS (quality of service) features relevant to distributed systems. We first introduce two new important concepts, namely; QoS-labeled interactions and QoS-embedded interfaces. Based on these, we provide a UML metamodel of interfaces and interaction signatures. The final metamodel being a first step towards a QoS-embedded computational metamodel. Finally, we redefine computational rules in a compact manner thanks to the new concepts introduced, as well as we make use of the OCL (object constraints language) language

2wards QoS-capable ODP computational interfaces

International audienceThis paper proposes a new model of ODP interfaces and interactions in the RM-ODP computational viewpoint. We particularly introduce a new type of ODP computational interfaces called QoS-Capable interfaces

Specification of OCL constraints on ODP computational interfaces

International audienceOpen Distributed Processing systems are constructed in terms of five viewpoints. The computational viewpoint which supports three sorts of interaction models imposes constraints on their corresponding computational interfaces. Computational interfaces are strongly typed so as to sustain meaningful object interaction. We address in this work the need to re-verbalize both interaction signature concepts, and, typing rules for computa-tional interfaces in order to steadily formalise them; while, preserving semantics of their initial definitions. This need comes from the fact that those initial definitions are ambiguous, because, they are described in natural lan-guage. Based on their new definitions, we shall present a consistent UML model for interaction signatures, as well as, OCL specification of typing rules concerning computational interfaces supporting those interactions