1. A processor-implemented method for assigning a score to a selected element in a first database having N elements D i , comprising the steps of: subdividing the interval [0, 1] into a plurality of EG equal intervals I k i , each interval of width 1/EG, wherein EG comprises a quantity of a plurality of opinion parameters O N retained for analyzing the first database; defining intervals I k r , determined in accordance with the following relationship: I k r = [ ( k - 1 ) EG , k EG [ wherein 1≦k≦(EG−1); associating each interval I k r with an integer interval I k e comprising integer limits, I k e determined in accordance with the following relationship: 
 I k e =└B (k-1) ,B k └, wherein B−1 comprises a maximum frequency of appearance associated with O N ; representing each element D i of the first database by a vector of length EG, determined in accordance with the following relationship: 
 D i =(α 1 , α 2 ,. .. , α EG ), wherein α N is a frequency of appearance of the opinion parameter O N in the element D i of the first database, with 0≦α M ≦(B−1); determining an integer value V i of an overall score for the element D i of the first database, determined in accordance with the following relationship: V i = ∑ k = 1 EG α k × B ( k - 1 ) ; determining an interval I k e having integer limits [m e , M e [ corresponding to an interval I k r having decimal limits [m d ,M d [, wherein V i belongs to I k e and I k r ; determining a decimal value overall score N i within the interval [0, 1] for the element D i of the first database, N i determined in accordance with the following relationship: N i = m d + V i - m e EG × ( M e - m e ) ; searching a second database, for the pairing (element, decimal value overall score), by use of a process executed on the processor; and generating an alert if the pairing is found in the second database.