CPRM (Content Protection for Recordable Media)
A digital-rights-management scheme developed by the 4C Entity to bind protected content and keys to specific hardware, reportedly designed as a successor technology after the compromise of the Content Scramble System (CSS/DeCSS) prompted Warner Music Group to seek stronger DVD-Audio protection (Wikipedia, Tier 4 pointer only). Its highest-profile fight was the failed 2000–2001 attempt to standardize it into the T13 ATA hard-drive command set (claim-4c-entity-cprm-proposal-bound-content-to-specific-ata-drive); the same underlying technology shipped successfully in SD cards as the SDSD-CPRM extension in 2007.
References
- claim-4c-entity-cprm-proposal-bound-content-to-specific-ata-drive
- claim-ibm-withdrew-2001-cprm-ata-proposal-resubmitted-as-generic-functionality
- claim-t13-rejected-generic-functionality-proposal-april-2001-supermajority-rule
- claim-andre-hedrick-opposed-cprm-ata-standardization-on-vendor-unique-command-grounds
- claim-davidoff-2001-opposed-cprm-drm
- Captures: 10-inbox/raw/2026-07-30-what-exactly-did-the-4c-entitys-cprm-proposal.md
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