Method for validating a transaction during a radio communication

A terminal having capabilities for intra-body communication via a user carrying the terminal, the terminal comprising:

• a processor that is configured so as to:
• receive, from a communication device, a signal characterizing that the user has performed an approach gesture toward the device, between first and second time instants;
• detect, in the signal, a first radio data frame generated between the first and second time instants, the first radio data frame being at a same frequency as that of the signal;
• detect, in the signal, a second radio data frame generated between the first and second time instants, the second radio data frame being at a frequency different from that of the signal;
• compare the first radio data frame with the second radio data frame;
• and
• validate a transaction depending on presence or absence of information common to the compared first and second radio data frames.

A non-transitory computer-readable information medium comprising instructions of a computer program stored thereon, which when executed by a processor of a terminal, configure the terminal to perform a method for receiving a signal during an intra-body communication via a user carrying the terminal, wherein the method comprises:

• receiving the signal from a communication device, the signal characterizing that the user has performed an approach gesture toward the device between first and second time instants;
• detecting, in the signal, a first radio data frame generated between the first and second time instants, the first radio data frame being at a same frequency as that of the signal;
• detecting, in the signal, a second radio data frame generated between the first and second time instants, the second radio data frame being at a frequency different from that of the signal;
• comparing the first radio data frame with the second radio data frame;
• and
• validating a transaction depending on presence or absence of information common to the compared first and second radio data frames.