Abstract: The invention relates to a device that is placed in a computer network for securing the communication flows passing through the device. The communication flows are secured using portable codes, known as portable agents, which can be downloaded from a remote terminal. The portable agents cannot be executed by the device until they have been compiled by a compiler which is present in the device, at which point they become executable agents. The compiler translates the portable agents, which are written in a language that is independent of the processor, into executable agents written in the language of the processor of the device, while placing controls on the functions performed by the agent. The executable agents are then executed in the device in accordance with the communication flows passing through it and a security policy, which can also be downloaded from a remote terminal.

Abstract: The invention concerns a server for management of authentication (S) and devices interconnected between each computer equipment needing to be made secure and the communication network. It enables to make secure said network in a distributed and dynamic manner. The device intercepts communications between a computer equipment (A) whereto it is connected and the network and enables to obtain, by means of an authenticating module, data concerning a user (U) and to define a security level for said device. The authentication management server (S), connected to the network, processes said data and said security level and authenticates the user (U). The server (S) manages the authentication and transmits to the network devices security parameters. Said parameters are stored and processed by the network devices.