Method of managing security entities positioned to cut off an information stream within a network. The method includes designating an entity to act as a sponsor for a new ward wishing to join the network, requesting to connect the ward with the sponsor, said sponsor determining whether or not it accepts the connection. If the sponsor accepts the connection, then connecting the sponsor and disconnecting from the plurality of entities forming the network. At least one of the entities and the sponsor checking a security level of said ward. If at least one of the entities decides to trust said ward, then the sponsor transmits to the ward configuration information to enable the ward to enter into communication with the network. If at least one of the entities decides not to trust the ward, then the ward cannot access the network and an alarm is generated.