Secure short-range radio communication device, system and method

A short-range point-to-point mono or bi-directional radiocommunication method, comprising the steps of:

• providing a first and a second secure communication device, each comprising:
• first transceiver apparatus (1110;
• 2110;
• 3110;
• 4110) suitable for transmission and/or reception of an electromagnetic beam with a non-zero value (l10) of the topological charge of the OAM;
• additional transceiver apparatus (1120;
• 2120;
• 3120,3130;
• 4120,4130) suitable for transmission and/or reception of at least one second electromagnetic (EM) beam which is co-polar and isofrequential with the first beam generated by the first apparatus (1110;
• 2110;
• 3110;
• 4110) and with a value of the topological charge of the OAM different from the topological charge value of the beam transmittable and/or receivable by the first transceiver apparatus (1110;
• 2110;
• 3110;
• 4110);
• associating a data communication channel (C1) with a first carrier comprising an EM beam with non-zero value (l10) of the topological charge of the OAM transmittable and/or receivable by the first transceiver apparatus (1110;
• 2110;
• 3110;
• 4110);
• associating at least one additional data channel (C2,C3) with a carrier isofrequential and co-polar with the first carrier and comprising one of said at least on additional EM beam with value (l20;
• l30) of the topological charge of the OAM different from the topological charge value of the OAM of said first EM beam transmittable and/or receivable by the additional transceiver apparatus (1120;
• 2120;
• 3120,3130;
• 4120,4130), so as to provide a high security characteristic preventing interception of the information content of the information transmitted on said first and or at least one additional channel;
• Wherein said first and/or second secure communication device/s is/are included:
• in a security card, more particularly a credit card, cashpoint card, identification card or the like;
• or
• in a reader device for a security card, more particularly a reader for a credit card, cashpoint card, identification card or the like;
• or
• in a portable multimedia device, for example a smartphone or tablet, or in a reader for such a multimedia device;
• arrangement of the first and second devices in a condition of substantial alignment and at a suitable relative distance (dAB), preferably greater than than the wavelength (λ) of the signals transmitted;
• unidirectional or bidirectional communication on said at least two channels (C1,C2) between the first and the second devices.