Securite de l'information (French text)

This document summarizes the knowledge bank of the different measures and levels available, in regards to security on VPN and Web servers. It is developed within the framework of a Master's project, entitled “Security of Information”.; In this document, we discuss the different encoding techniques available for these environments, identify the possible attacks scenarios, detection systems and different possible parades.; The definition of “Security Data Processing”, which reflects this project, is too wide. This document, is addressed to system administrators, as well as to the public.; The applied methodology to realize this project leans on: (a) an elaborated library research (deliver and items); (b) an inventory of sites, forums and groups of discussions that treat similar projects; (c) analysis and objective of different attacks; (d) description of security tools offered in the market.; With an established coherence between hardware and software security, I present the strategy of security. I describe methods and composing architecture elements secured data processing in order to offer data integrity as well as users authentication through VPN and Web servers.; At last, I recommend a series of protection tools in order to avoid different forms of attacks. I show the effectiveness of this protection and tools available to verify the security, detect attacks against the VPN and the Web servers.