World Library  
Flag as Inappropriate
Email this Article

4C Entity

Article Id: WHEBN0003013792
Reproduction Date:

Title: 4C Entity  
Author: World Heritage Encyclopedia
Language: English
Subject: Digital rights management, Cryptomeria cipher
Collection: Consortia, Digital Rights Management
Publisher: World Heritage Encyclopedia

4C Entity

The 4C Entity (which should be read out as "the four company entity") is a consortium formed by IBM, Intel, Matsushita and Toshiba to establish a common platform for digital rights management schemes. The activities center on the Cryptomeria cipher (also known as C2) which is a proprietary, patented cipher that needs to be licensed from the 4C Entity.

The 4C Entity has developed the Content Protection for Recordable Media (CPRM) and the Content Protection for Prerecorded Media (CPPM) schemes, sharing a lot of common features and therefore commonly known as CPPM/CPRM. The first successful implementation of the CPRM scheme is found in Secure Digital cards (SD cards). The SD card DRM scheme is however almost never used and often not supported by card reader hardware. All card manufacturers are required to implement it however. The CPPM scheme is adopted for DVD-Audio.

The 4C Entity also made a proposal for a sequel to the content-scrambling system (CSS) named CSS2, however after the first version was broken, the proposal was withdrawn.

External links

  • The 4C Entity
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.