Structure of safety and article incorporating such a structure

This invention relates to a security structure (3) intended to be incorporated or fastened, at least partially in or on an article, for example a security document and / or value, the structure comprising: - at least one first fluorescent zone capable of emitting by fluorescence, in a predefined illumination condition, visible light of a first color, - at least one second fluorescent zone capable of emitting by fluorescence, under the predefined illumination condition, light visible of a second color, different from the first, the first and second fluorescent zones being observable from the respective opposed faces (19) of the structure.