DISPOSITIF ET PROCEDE DE PROTECTION DE DOCUMENTS OU DE VERIFICATION DE L'AUTHENTICITE D'UN DOCUMENT, PAR UTILISATION D'UNE INFORMATION CHIFFREE ELABOREE PAR LE PROCEDE, ET DOCUMENTS PROTEGES PAR LADITE INFORMATION

摘要

The invention concerns a method for producing an encrypted information from character strings and numeric values of specific size and representing items to be protected for identifying forgery of administrative documents or documents delivered by public authorities comprising the following steps which consist in: condensing said strings into several numbers of n figures smaller in size than the number representing the size of the strings to constitute a first set of m intermediate results of n figures; transforming said m intermediate results, with an algorithm randomly drawn among several, into a second result of n figures expressed in base 10 produced by a matrix converting characters of an alphanumeric base into digital characters of a decimal base stored by a computing system; converting said second result expressed in base 10 into another so-called encrypted result with the same number of n figures, expressed in a mathematical base randomly selected by the computing system among a specific selection of available conversion bases stored by the computing system, to obtain an encrypted identifier.