Abstract EN:

Organization networks are continuously growing so as to sustain the newly created organizational requirements and activities. In parallel, concerns for assets protection are also increasing and security management becomes an ever-changing task for the security officer. In this dissertation we address several key aspects of network security management providing solutions for each aspect:1. Policy deployment based on access control models. Invalid or unusable data of the security policy will have been removed before deploying the abstract policy through a set of algorithms; in this manner, the security officer’s tasks are greatly simplified. 2. Formal algorithm development. The correctness of the algorithms involved in the policy deployment process is of undeniable importance. These algorithms should be proved so that the security officers trust the automatic policy deployment process. 3. Management of contextual requirements and of limited security functionalities. The access control model should be robust enough to cover contextual requirements. The issue is that the security devices are not always able to interpret the contexts. And sometimes, there are security requirements which cannot be deployed given the existing limited security functionalities in the IS. 4. New IPv6 security mechanisms. We have naturally come to consider the design of new IPv6 security mechanisms when dealing with the lack of functionalities in an information system. Our research outlines a comprehensive approach to deploy access control security policies. Actually, it constitutes a step further towards an automatic and reliable management of network security.