Slim Trabelsi

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When designing a service-based business process employing loosely coupled services, one is not only interested in guaranteeing a certain flow of work, but also in how the work will be performed. This involves the consideration of non-functional properties which go from execution time and costs, to trust and security. Ideally, a designer would like to have(More)
Mobile devices consume significant amounts of information, from different sources. Thus they often deal also with sensitive or confidential data, in places or situations that could be not appropriate, or not compliant with a corporate policy: context-aware access/usage control solutions can counter such situations. We propose a prototype, called ProtectMe,(More)
One of the main security concerns related to the cloud hosting and virtualization, is the lack of Trust in the infrastructure. This lack of trust is due to the absence of transparency concerning the data handling and storage conditions. There are no concrete technical guarantees that can convince a potential cloud customer that he is fully controlling his(More)
This paper is focused on the performance analysis of a particular cell where a commonly implemented resource sharing scheme, namely Partial Partitioning (PP), is employed to distribute downlink radio channels among GSM and (E)GPRS traffics. The aim of this work is to derive simple and accurate Erlang-like law that could be used to dimension partitions sizes.
In service-oriented systems a constellation of services cooperate, sharing potentially sensitive information and responsibilities. Cooperation is only possible if the different participants trust each other. As trust may depend on many different factors, in a flexible framework for Trust Management (TM) trust must be computed by combining different types of(More)
Dynamic and self-organizing systems like those found in ubiquitous computing or semantic Web based scenarios raise numerous challenges regarding trust and privacy. Service discovery is a basic feature of SOA deployment in such systems, given that entities need to locate services they can describe but that they do not necessarily know. PKI based solutions to(More)
Dynamic and self organizing systems like those found in pervasive computing systems or semantic Web based scenarios raise numerous SOA deploymentchallenges regarding security and privacy. Service discovery is a basic feature of SOA deployment in such systems, given that entities need to locate services they can describe without an a priory knowledge. After(More)
Many companies have to share various types of information containing private data without being aware about the threats related to such non-controlled disclosure. Therefore we propose a solution to support these companies to evaluate the disclosure risk for all their types of data; by recommending the safest configurations using a smart bootstrapping system.