Method of proximity detection between two devices

A first device comprising:

• a collector configured to collect a first information on exposure of the first device to electromagnetic waves, said first information including a first list of sources of electromagnetic waves exposing the first device;
• a communication module configured to establish a communication with a second device;
• wherein the communication module is further configured to receive a second information on exposure of the second device to electromagnetic waves, via the established communication, said second information including a second list of sources of electromagnetic waves exposing the second device;
• and
• the first device further comprises a proximity detection module configured to determine a consistency information between the two lists and to use said consistency information to determine a matching information between the first information on exposure and the second information on exposure and detect either proximity or non-proximity between the first and the second device depending on the matching information.

A non-transitory computer readable medium that stores a computer program comprising instructions which, when executed by a first processor, cause the first processor to execute

• collecting a first information on exposure of the first device to electromagnetic waves, said first information including a first list of sources of electromagnetic waves exposing the first device;
• receiving a second information on exposure of the second device to electromagnetic waves from the second device;
• determining a consistency information between the two lists and using said consistency information to determine matching information between the first information on exposure and the second information on exposure;
• and
• detecting either proximity or non-proximity between the first device and the second device based on the matching information.