Ready for the Secured Digital Content

Content Protection for Recordable Media (CPRM), the content protection technology used for SD standards, is key to enabling a distribution system for music, video, etc. CPRM provides a high level of protection against illegal copying. The content protection technology was developed by the 4C Entity, LLC,The digital contents copyright protection technology licensing organization of IBM, Intel, Panasonic, and Toshiba.

The SD memory card CPRM function has the following features:

• Success of mutual authentication enables host to access card protected area.
• The protected area consumes small memory area because a content key is supposed to be saved instead of a large content.
• Revocation feature can prevent a specific host from accessing card protected area.
• SD CPRM Host Devices can playback an encrypted content mutually that is stored in an SD memory card.

CPRM which is also used for DVD content protection was mandated on all SD memory cards. In March 2018, CPRM became optional with SD Specification Version 6.10. The following symbol have been newly defined for the purpose of distinguishing
SD cards with out CPRM from those with CPRM. The use of this symbol on SD card package and Web/catalog is mandated in the Japanese market only. As for the markets outside of Japan, the use of this symbol is optional.