DIGITAL FILE MARKED BY A SUITE OF TRADEMARKS WHOSE CONCATENATION IS FORMING A MESSAGE AND METHOD OF EXTRACTING A BRAND OF SUCH A DIGITAL FILE MARK

摘要

The marked digital file (10) has several parts, some of which (12) are marked with a mark (14) of a series of marks so as to form a sequence of marked portions (12). The concatenation of the brands (14) of the suite forms a message. Each mark (14) contains an identifier (I, I0 to 15, J0 to J2) of the mark (14), defined by a numerical value, this value varying from one mark (14) to the other depending on the order of the marks (14) in the series of marks. The sequence of marked games (12) comprises sub-suites of at least two marked portions (12), such that all the parts (12) of the same subsequence are marked with the same mark (14).