Abstract: System and method for optimizing the transmissions of data associated to an impersonal identifier of the receiver, made of an architecture on which the computer software implementing the optimization method runs, including an emitter which “is made aware” by several possible means of the receiver's impersonal identifier II, and which transmits the relevant data to the receiver, an input device for the II, and the various types of data transmitted by the emitter, an operative memory OM where every bijective pair of personally identifiable information PII is stored, respectively impersonal identifier II, a central computer with server function receiving II and data from the emitter and using the PII associated with II transmits the data together with PIT to the receiver by a Communication Service Provider CSP, an output device to transmit data to a receiver, known in itself, and in order to optimize the technical functional parameters of the system, a sub-system called Personal Data Manager PDM running on the s