Wearable device with integrated RFID or NFC chipset, comprising: - a first microchip for management and encryption of radio-frequency communications in RFID or NFC standards; - at least one antenna associated with said first microchip , said at least one antenna comprising metal coils adapted to transmit/receive signals in RFID or NFC standards and/or metal coils (7") adapted to generate via electromagnetic induction the-electric current required for operation of said device ; and - a memory chip , adapted to contain data and encryption keys of the data, manageable by the first microchip , characterized in that the wearable device comprises: - a reversible closing buckle of a wearable object , said buckle being associated with opposite ends of said coils (7', 7") of said at least one antenna ; - a second microchip (2") associated with said reversible buckle of the wearable object , said second microchip (2") being adapted to detect an open state of the reversible buckle ; and - the wearable object , said wearable object integrating the first microchip , the at least one antenna , the memory chip , and the second microchip (2"), wherein the wearable device is configured such that an opening of said buckle causes a point of discontinuity in said coils (7', 7") of said at least one antenna , said point of discontinuity being capable of reversibly inhibiting functions of transmission/reception of signals in RFID or NFC standards and functions of generating electric current via electromagnetic induction of said coils (7', 7"), and wherein said second microchip (2") is adapted to cause deactivation of said first microchip and simultaneous deletion of the data and of the encryption keys contained in said memory chip after the buckle has been opened, so as to prevent unauthorized transmission by said first microchip of the data and of the encryption keys of the data, contained in said memory chip associated therewith. - a first microchip for management and encryption of radio-frequency communications in RFID or NFC standards; - at least one antenna associated with said first microchip , said at least one antenna comprising metal coils adapted to transmit/receive signals in RFID or NFC standards and/or metal coils (7") adapted to generate via electromagnetic induction the-electric current required for operation of said device ; and - a memory chip , adapted to contain data and encryption keys of the data, manageable by the first microchip , characterized in that the wearable device comprises: - a reversible closing buckle of a wearable object , said buckle being associated with opposite ends of said coils (7', 7") of said at least one antenna ; - a second microchip (2") associated with said reversible buckle of the wearable object , said second microchip (2") being adapted to detect an open state of the reversible buckle ; and - the wearable object , said wearable object integrating the first microchip , the at least one antenna , the memory chip , and the second microchip (2"), wherein the wearable device is configured such that an opening of said buckle causes a point of discontinuity in said coils (7', 7") of said at least one antenna , said point of discontinuity being capable of reversibly inhibiting functions of transmission/reception of signals in RFID or NFC standards and functions of generating electric current via electromagnetic induction of said coils (7', 7"), and wherein said second microchip (2") is adapted to cause deactivation of said first microchip and simultaneous deletion of the data and of the encryption keys contained in said memory chip after the buckle has been opened, so as to prevent unauthorized transmission by said first microchip of the data and of the encryption keys of the data, contained in said memory chip associated therewith. <EOS>