Abstract: The invention relates to processing, at a transmitting entity, messages to be transferred between a transmitting entity and a receiving entity. The method comprises: obtaining a message to be transferred to the receiving entity, defining a substantially unique identifier at least for one part of the message to be transferred, conditionally replacing said part of the message to be transferred with said substantially unique identifier, and forwarding the message for transfer to the receiving entity.

Abstract: A system can be located in a communication network in which it handles several simultaneous sessions and transmits messages between end nodes. The system identifies a type of transaction belonging to a session. The transaction type identified is mapped to a token that belongs to an input alphabet of an automaton. The system inputs the said token into the automaton that is preferably a deterministic finite-state automaton. According to a response of the automaton, the system performs a set of predefined tasks. Those tasks may concern analysing the use of a service, charging of an end-user, etc.