Description

This article is from the CD-Recordable FAQ, by Andy McFadden (fadden@fadden.com) with numerous contributions by others.

2-4-9] How does the Doc-Witness OpSecure CD-ROM work?

(2002/08/22)

The disc has an embedded secure micro (like a smart card) that is activated
when the laser light strikes a photodetector. The light is converted to
electrical impulses, the impulses drive the chip, and if all goes well
the results are presented to the drive via an embedded light-emitting diode.

Making an exact duplicate of the disc would be very difficult. It's unclear
whether this technology actually makes it harder to get a working copy
of the contents. The scheme seems to essentially be a combination of an
"uncopyable" disc and a hardware dongle, both of which have been around
for years (neither of which have brought an end to piracy).

The company's web site is http://www.doc-witness.com/.

News articles:

- http://www.technologyreview.com/articles/prototype10902.asp?p=7

 

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• prev: 2-4-8] ...on an audio CD (Sanyo)
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• next: 2-4-10] What's the Sony BMG rootkit (First 4 Internet XCP)?

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