CD-Cops

CD-Cops was the first CD-ROM protection system to use the geometry of the CD-ROM media rather than a hidden "mark". It was invented in 1996 by Danish Link Data Security, known for its Cops Copylock key-diskette security used in the 1990s by Lotus 1-2-3.

Overview

As a copy (CD-R or CD-ROM) will have a different geometry, Data Position Measurement needs to be used for copies. The geometry is not known before CDs have been produced, therefore a CD-code expressing the layout of the CD-ROM must be entered the first time a user runs the protected software. Using a special production process in some cases the CD-code is embedded on the CD-ROM. CD-Cops is popular for encyclopaedias/dictionaries and business applications but not used as much for games.

DVD-Cops, based on the same principles, was the first DVD-ROM protection system, made in 1998.

References

=Sources=

[http://www.slideshare.net/rootlabs/copy-protection-wars-analyzing-retro-and-modern-schemes-rsa-2007 Analysis]
[http://scout.wisc.edu/Reports/NSDL/MET/2002/met-020719-topicindepth.html Report]
[http://www.cdmediaworld.com/hardware/cdrom/cd_protections_cd-cops.shtml cdmediaworld]
[https://web.archive.org/web/20110714064724/http://www.mediasoftint.com/download/cdcops.pdf PDF]
[https://web.archive.org/web/20110928155154/http://ing.dk/artikel/17381 article]

External links

[http://www.linkdata.com/index.htm#cdcops CD-Cops] {{Webarchive|url=https://web.archive.org/web/20160421185034/http://www.linkdata.com/index.htm#cdcops |date=2016-04-21 }} at linkdata.com
[http://www.linkdata.com/index.htm#dvdcops DVD-Cops] {{Webarchive|url=https://web.archive.org/web/20160421185034/http://www.linkdata.com/index.htm#dvdcops |date=2016-04-21 }} at linkdata.com

Category:Compact Disc and DVD copy protection

Category:Digital rights management for macOS