Method and a system for detecting a potential threat in a shoe worn by an individual

A method for detecting a threat in a shoe worn by an individual accessing a restricted access area through a security access point, the method comprising steps of:

• obtaining a first response provided by a first metal detector sensing conjointly and cumulatively a pair of shoes worn by the individual standing on or walking through the security access point;
• detecting a critical pair of shoes by comparing said first response with a predefined signature signal representing a pair of shoes comprising a threat or an object representing a threat;
• and in response of a comparison indicating the critical pair of shoes:
• prompting the individual to place the critical pair of shoes at a first and second predefined position with respect to a second and to a third metal detector;
• obtaining a second and a third response provided by respective second and third metal detectors sensing respectively one and the other of the critical pair of shoes at said first and second predefined positions;
• and
• detecting a potential threat for each shoe of said pair of shoes by comparing the second and third responses with given threshold.