Apparatus and method for issuing, authenticating securities et al. using digital watermarking

The present invention provides various issuing documents (hereinafter referred to as "oil, such as a digital file in the form of gift certificates, various tickets, coupons, electronic stamps, bonds, notes, sovereignty, lottery tickets, bank notes, checks, etc., conventional securities and Class identification and authentication is required Certificate securities "means), a robust watermark and fragile oil a watermark inserted at the same time or semi watermark securities, including on the right off-line after the output in paper form by simple secure issuance or purchased online through like this printer to be used as securities, and the apparatus and method that can reliably through the detection of the inserted forgery whether through a copy of such securities issued in paper form, including through such printer's watermark and easily determine to authenticate them It provides.