A method of communication between objects belonging to one and the same network and each comprising a memory in which is one and the same mathematical mapping dependent on several variables and at least one key and communicating among themselves by virtue of one and the same protocol, which method comprises the following steps: - generation, by a first object the so-called transmitter, of a number or of several numbers, for example random numbers, - calculation, in the transmitter, of the image of this number via a mapping which is itself the image via the mapping contained in memory, of the key which the transmitter contains or of the images of these numbers via mappings which are themselves the images via the mapping contained in memory, of the keys which the transmitter contains, - transmission, by the transmitter, of a frame containing at least one order, the number generated by the transmitter and its image or the numbers generated by the transmitter and their images, - reception of this frame, by each of the other objects (Oi), the so-called receivers, - calculation, in each receiver (Oi), of the image (R1i) of the number generated by the transmitter via a mapping (FKli) which is itself the image via the mapping contained in memory, of the key (K1i) which each receiver (Oi) contains or of the images (Rni) of these numbers (Nni) generated by the transmitter via mappings (FKni) which are themselves the images via the mapping contained in memory, of the keys (Kni) which each receiver (Oi) contains, - comparison, in the receivers (Oi), of the image (R1i) specific to each receiver (Oi) with the image specific to the transmitter, or of the images (Rni), specific to each receiver (Oi) with the images specific to the transmitter, - execution of the order by the object or objects (Oi) whose image (R1i) is equal to the image or execution of the order by the object or objects (Oi) whose images or some of whose images (Rni) are equal to the images. - generation, by a first object the so-called transmitter, of a number or of several numbers, for example random numbers, - calculation, in the transmitter, of the image of this number via a mapping which is itself the image via the mapping contained in memory, of the key which the transmitter contains or of the images of these numbers via mappings which are themselves the images via the mapping contained in memory, of the keys which the transmitter contains, - transmission, by the transmitter, of a frame containing at least one order, the number generated by the transmitter and its image or the numbers generated by the transmitter and their images, - reception of this frame, by each of the other objects (Oi), the so-called receivers, - calculation, in each receiver (Oi), of the image (R1i) of the number generated by the transmitter via a mapping (FKli) which is itself the image via the mapping contained in memory, of the key (K1i) which each receiver (Oi) contains or of the images (Rni) of these numbers (Nni) generated by the transmitter via mappings (FKni) which are themselves the images via the mapping contained in memory, of the keys (Kni) which each receiver (Oi) contains, - comparison, in the receivers (Oi), of the image (R1i) specific to each receiver (Oi) with the image specific to the transmitter, or of the images (Rni), specific to each receiver (Oi) with the images specific to the transmitter, - execution of the order by the object or objects (Oi) whose image (R1i) is equal to the image or execution of the order by the object or objects (Oi) whose images or some of whose images (Rni) are equal to the images.