Arc-shaped anti-fake method and arc-shaped anti-fake element

The invention discloses an arc-like anti-counterfeiting method for concealing confidential image information and an arc-like anti-counterfeiting element obtained by using the method. The anti-counterfeiting method comprises the following steps: constructing two arc-like encrypted icons by using visual sharing technology according to a confidential image; for two different encrypted icons, restoring a confidential image by matched overlapping of the two different encrypted icons; and for two same encrypted icons, restoring a confidential image by unmatched overlapping of the two same encrypted icons. The arc-like anti-counterfeiting element provided by the invention has more flexibility compared with rectangular anti-counterfeiting icons, can be printed on paper, plastics, transparent/semitransparent films, metal coatings, foils or other materials suitable for printing, can increase anti-counterfeiting and information concealing effects through integrally combining with special ink, melting silk screen, gravure or offset printing technology, and has the characteristics of easy recognition and difficult counterfeiting.