Abstract: The invention relates to a secure interfacing device (20), suitable for storing at least one tag (30), and/or transferring the tag to at least one data storage and transmission terminal (1), comprising: means (22) for detecting and extracting at least one of said tags and/or at least one item of information suitable for downloading at least one tag, in a data stream; means (29) for managing and/or storing said tag(s); means (23) for receiving a transmission request (2001) of at least one tag, sent by one of said terminals; first means (24) for the radiofrequency transmission of said at least one tag to said terminal (1).

Abstract: A terminal comprises at least one monitor, capable of rendering image data, and radio frequency communication means for communicating with at least one additional communicating device. Said monitor supports, on at least one portion of the surface thereof, a transparent antenna which does not interfere with rendering said image data, and which works in cooperation with said radio frequency communication means. Said terminal comprises data generation means indicating the presence of said antenna, forming a portion of said image data rendered by said monitor.

Abstract: A method is provided for secure transmission of a data file from a sender terminal to at least one recipient terminal, each including a near-field communication device and implementing an encryption of the file, as a function of at least one item of encryption information that is known or determined by the sender terminal. The includes the following steps, in the sender terminal: dividing the file into a first file portion and a second file portion; sending with the near-field communication device a first data set including at least one portion of the encryption information item and the first file portion to the recipient terminal or terminals; sending with a radiofrequency transmitter a second data set including at least the second file portion to the recipient terminal or terminals.