Fraud detection system and method

A method for detecting fraud in the event of the purchase by at least one user of at least one item comprising at least:

• a. a capturing step, performed by at least one user terminal, of a plurality of data from at least one sensor, the capturing step comprising at least the following steps:
• i. obtainment of an identifier of the item by at least one identification device;
• ii. determination by at least one optical device of at least one trajectory of the item manually moved by the user in a three-dimensional space, said three-dimensional space comprising at least:
• 1. an identification area corresponding to a volume of the three-dimensional space in which at least one portion of the item is intended to be disposed by the user to achieve the obtainment of the identifier of the item;
• 2. an entrance area corresponding to a volume of the three-dimensional space crossed by the item when the user deposits the item in at least one container associated with the user terminal);
• iii. sending by the user terminal to at least one computer processing unit of:
• 1. the identifier of the item from the identification device;
• 2. the trajectory of the item;
• b. a processing step performed by the computer processing unit, of the plurality of data comprising at least the following steps:
• i. generation of at least one behaviour of said item from at least the trajectory of the item in the three-dimensional space;
• ii. comparison of the behaviour of said item with a plurality of predetermined behaviour models so as to identify a handling anomaly by the user;
• c. a step of determining a probability of fraud as a function of said behaviour comparison, this probability being non-zero if a handling anomaly has been identified.