Abstract: The invention concerns a method for identifying a protocol of a data stream exchanged between two entities of a telecommunication network, the processing method comprising the following steps: on receiving data of the data stream, grammatical parsing of said data stream in order to identify a protocol of the data stream; in the event of failure to identify the protocol of the data stream by grammatical parsing, consulting a signature engine mapping protocols with corresponding signatures, and sequentially applying signatures to the data flow in order to identify a data stream protocol.

Abstract: The invention relates to a method for processing a data stream exchanged between a client and an entity via a telecommunications network, the data stream including a set of data packets, the processing method including the following steps: upon intercepting (201) a data packet belonging to a data stream—the data stream including a source and a recipient, the client being the source or the recipient of the data stream—copying (204) the data packet and transferring (205) the data packet to the recipient; transmitting said copy to a stream analyser capable of analyzing the data stream; receiving (206) a data stream analysis result from the stream analyser; and processing (207; 208) the data stream in accordance with the receiver analysis result.

Abstract: In a phase of configuration, a state machine is constructed with states and transitions configured according to at least one type of data to be extracted from a data stream travelling around an IP network. The transitions between states are activated by conditions defined as a function of rules of organization of the data of the stream according to an application layer protocol. One or more states are moreover selected for the extraction of data from the stream. Thereafter, in a phase of real-time analysis of the stream, the stream data arising from IP packets travelling successively around the network are observed. When the state machine is in a current state, a search is conducted as to whether a condition of activation of a transition to a target state is realized by the data observed from the stream, and when such an activation condition is realized, the state machine is toggled into the target state.