In concept, “glyphing” is a “black box” mode work process: documents are placed inside on one side, and the same document with a glyph comes out from the other. Electronic watermark, also called “e-Stamp”, “2D barcode” or “Glyph”, is a sequence of bits coded using a graphic technique able to alternatively represent an electronic administrative document, its abstract, one of its copies, one of its duplicates or its identifying data. The “glyph” is therefore a pointer to the electronic document from which the analog document was generated, on which the “glyph” is affixed. ”Glyph” black box technology is a software developed in .NET and Java (open source libraries).