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.
