| 摘要 |
One aspect of the invention includes one or more security devices embedded on one of the two surfaces, or between the two surfaces, of a compact disc (CD) or digital video disc (DVD) to impede the counterfeiting of the disc. The security devices may be, for example, holograms, optically variable devices (OVD) or RFID chips. CD/DVD is an authorized (non-pirated) version of a manufacturer's product. A system embodying the invention includes a player/reader which contains means for sensing selected characteristics of the security devices embedded on or within a CD/DVD and which is programmed to ascertain that the CD/DVD is in fact a valid document. Another aspect of the invention may include encrypting apparatus for reading/sensing selected characteristics of security device(s) and for annotating the disc and/or the security device(s) with corresponding information. Still another aspect includes a player/reader which is programmed to sense selected characteristics of security device(s) and/or to read information written back onto the disc and/or on the security device and to compare the information to ascertain the validity of the disc.
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