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List of Compact Disc and DVD copy protection schemes
・ List of compact disc player manufacturers
・ List of Compact Discs sold with Extended Copy Protection
・ List of Compact Discs sold with MediaMax CD-3
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List of Compact Disc and DVD copy protection schemes : ウィキペディア英語版
List of Compact Disc and DVD copy protection schemes

This is a list of notable copy protection schemes for CD and DVD.
For other medias, see List of Copy Protection Schemes.
== Commercial CD protection schemes ==

; CD-Cops
: Requires the user to enter CD-code (or reads embedded CD-code) that describes geometry of CD to correctly locate data on the disc.
; SafeDisc (versions 1-5)
: Adds unique digital signature at the time of manufacturing which is designed to be difficult to copy or transfer so that software is able to detect copied media.
; SafeCast
: The encryption key will expire after pre-determined date so the media can be used only temporarily. Also used to implement trial editions of programs.〔"Macrovision Unveils SAFECAST Copy Protection Solution; SAFECAST Technology Designed to Secure Pre-Release Software from Unauthorized Copying" The Free Library 17 March 1999. 9 February 2013 <(Unveils SAFECAST Copy Protection Solution; SAFECAST...-a054129804 )>.〕
; SecuROM
: Limits the number of PCs activated at the same time from the same key.
; StarForce
: Asks for Serial ID at install or startup to verify the license.
; TAGES
: Verifies authentic copy by checking existence of "twin sectors" which are sectors with same logical address but different data. However, twin sectors may be hard to read in order to copy but are easy to write.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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