The device and method for directing the flow of exchange of factor (or not sensitive), making it possible to create of the loops secret several zones common.

摘要

Method and system for switching of the heat exchange factor, or not sensitive to create the keys common between several zones in a system where the entities are interconnected by groups of confidence, characterized in that it comprises at least the following steps: each entity generates a public value and communicates this public value to a router, the router transmits to a first entity, a public value of another entity belonging to the same group of confidence, this step is repeated for all the entities, each entity for the public value of another entity belonging to the same group of confidence, and determines the value of the encryption key common to the entities of a same group of confidence, an entity belonging to a same group (used to encrypt the data to be transmitted to another entity.