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4C Entity
The 4C Entity is a digital rights management (DRM) consortium formed by IBM, Intel, Panasonic and Toshiba that has established and licensed interoperable cryptographic protection mechanisms for removable media technologies. 4C Entity was founded in 1999 when Warner Music approached the companies to develop stronger DRM technologies for the then-novel DVD-Audio format after Intel’s CSS DRM technology was hacked. The group developed and currently lease the Content Protection for Recordable Media (CPRM) and the Content Protection for Prerecorded Media (CPPM) schemes, which use Media Key Block technology and the Cryptomeria cipher along with audio watermarks. 4C Entity has also written the Content Protection System Architecture (CPSA), which describes how content protection solutions work together and the role of each current technology. CPPM and CPRM are implemented in SD Cards, DVD-Audio, Flash media, and other digital media formats. Like many DRM technologies, 4C Entity and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Rights Management
Digital rights management (DRM) is the management of legal access to digital content. Various tools or technological protection measures (TPM) such as access control technologies can restrict the use of proprietary hardware and copyrighted works. DRM technologies govern the use, modification, and distribution of copyrighted works (such as software and multimedia content), as well as systems that enforce these policies within devices. Laws in many countries criminalize the circumvention of DRM, communication about such circumvention, and the creation and distribution of tools used for such circumvention. Such laws are part of the United States' Digital Millennium Copyright Act (DMCA), and the European Union's Information Society Directive (the French DADVSI is an example of a member state of the European Union implementing the directive). DRM techniques include licensing agreements and encryption. The industry has expanded the usage of DRM to various hardware products, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Consortium
A consortium (plural: consortia) is an association of two or more individuals, companies, organizations or governments (or any combination of these entities) with the objective of participating in a common activity or pooling their resources for achieving a common goal. is a Latin word meaning " partnership", "association" or "society", and derives from ("shared in property"), itself from ("together") and ("fate"). Examples Educational The Big Ten Academic Alliance in the Midwest and Mid-Atlantic U.S., Claremont Colleges consortium in Southern California, Five College Consortium in Massachusetts, and Consórcio Nacional Honda are among the oldest and most successful higher education consortia in the World. The Big Ten Academic Alliance, formerly known as the Committee on Institutional Cooperation, includes the members of the Big Ten athletic conference. The participants in Five Colleges, Inc. are: Amherst College, Hampshire College, Mount Holyoke College, Smi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 series of instruction sets, the instruction sets found in most personal computers (PCs). Delaware General Corporation Law, Incorporated in Delaware, Intel ranked No. 45 in the 2020 Fortune 500, ''Fortune'' 500 list of the largest United States corporations by total revenue for nearly a decade, from 2007 to 2016 fiscal years. Intel supplies microprocessors for List of computer system manufacturers, computer system manufacturers such as Acer Inc., Acer, Lenovo, HP Inc., HP, and Dell Technologies, Dell. Intel also manufactures motherboard chipsets, network interface controllers and integrated circuits, flash memory, Graphics processing unit, graphics chips, Embedded system, embedded processors and other devices related to com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panasonic
formerly between 1935 and 2008 and the first incarnation of between 2008 and 2022, is a major Japanese multinational conglomerate corporation, headquartered in Kadoma, Osaka. It was founded by Kōnosuke Matsushita in 1918 as a lightbulb socket manufacturer. In addition to consumer electronics, of which it was the world's largest maker in the late 20th century, Panasonic offers a wide range of products and services, including rechargeable batteries, automotive and avionic systems, industrial systems, as well as home renovation and construction. Panasonic has a primary listing on the Tokyo Stock Exchange and is a constituent of the Nikkei 225 and TOPIX 100 indices. It has a secondary listing on the Nagoya Stock Exchange. Corporate name From 1935 to October 1, 2008, the company's corporate name was "Matsushita Electric Industrial Co." (MEI). On January 10, 2008, the company announced that it would change its name to "Panasonic Corporation", in effect on October 1, 2008 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toshiba
, commonly known as Toshiba and stylized as TOSHIBA, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. Its diversified products and services include power, industrial and social infrastructure systems, elevators and escalators, electronic components, semiconductors, hard disk drives (HDD), printers, batteries, lighting, as well as IT solutions such as quantum cryptography which has been in development at Cambridge Research Laboratory, Toshiba Europe, located in the United Kingdom, now being commercialised. It was one of the biggest manufacturers of personal computers, consumer electronics, home appliances, and medical equipment. As a semiconductor company and the inventor of flash memory, Toshiba had been one of the top 10 in the chip industry until its flash memory unit was spun off as Toshiba Memory, later Kioxia, in the late 2010s. The Toshiba name is derived from its former name, Tokyo Shibaura Denki K.K. (Tokyo Shibaura Electr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography
Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or ''-logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security (data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively synony ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warner Music Group
Warner Music Group Corp. (trade name, d.b.a. Warner Music Group, commonly abbreviated as WMG) is an American Multinational corporation, multinational entertainment and record label Conglomerate (company), conglomerate headquartered in New York City. It is one of the "Major labels, big three" recording companies and the third-largest in the global music industry, after Universal Music Group (UMG) and Sony Music, Sony Music Entertainment (SME). Formerly part of WarnerMedia, Time Warner (now Warner Bros. Discovery), WMG was publicly traded on the New York Stock Exchange from 2005 until 2011, when it announced its privatization and sale to Access Industries. It later had its second IPO on Nasdaq in 2020, once again becoming a public company. With a multibillion-dollar annual turnover, WMG employs more than 3,500 people and has operations in more than 50 countries throughout the world. The company owns and operates some of the largest and most successful labels in the world, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DVD-Audio
DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio uses most of the storage on the disc for high-quality audio and is not intended to be a video delivery format. The standard was published in March 1999 and the first discs entered the marketplace in 2000. DVD-Audio was in a format war with Super Audio CD (SACD), and along with consumers' tastes tending towards downloadable music, these factors meant that neither high-quality disc achieved considerable market penetration; DVD-Audio has been described as "extinct" by 2007. DVD-Audio remains a niche market but some independent online labels offer a wider choice of titles. Audio specifications DVD-Audio offers many possible configurations of audio channels, ranging from single-channel mono to 5.1-channel surround sound, at various sampling frequencies and sample rates. (The ".1" denotes a low-frequency effects channel (LFE) for bass and/or special audio e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Content Protection For Recordable Media
Content Protection for Recordable Media and Pre-Recorded Media (CPRM / CPPM) is a mechanism for controlling the copying, moving, and deletion of digital media on a host device, such as a personal computer, or other player. It is a form of digital rights management (DRM) developed by The 4C Entity, LLC (consisting of IBM, Intel, Matsushita and Toshiba). The CPRM / CPPM specification defines a renewable cryptographic method for restricting content when recorded on physical media. The currently implemented method utilizes the Cryptomeria cipher (C2) algorithm for symmetric encryption. The types of physical media supported include, but are not limited to, recordable DVD media and flash memory. The most widespread use of CPRM is arguably in Secure Digital cards such as the SD-Audio standard. Note that the available 0.9 revision includes only the portions of the specification covering DVD media. The CPRM / CPPM specification was designed to meet the requirements of intellectual pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Media Key Block
The Media Key Block (MKB) is one of the keys included inside the copying protection system (DRM) AACS. This system is used to prevent Blu-ray and HD DVD formats from being copied. The system was developed by companies from the film industry and the electronics industry including IBM, Intel, Microsoft, Matsushita (Panasonic), Sony, Toshiba, The Walt Disney Company and Warner Bros. The MKB key is found in the physical support (the disc) together with the content of the disc encrypted. The ''MKB'' has the function of validating the reproduction devices on which the disc is being played and obtaining, from the devices codes, the key that will allow the decryption of the disc content. That is the Media Key (K_m). , version 78 has been the most recent MKB version. How it works ''Blu-Ray'' or ''HD-DVD'' have as content the encrypted data (usually video), the Volume ID (VID), the Encrypted Title Key(s) and the ''MKB''. The ''MKB'' is also found encrypted in the disc to prevent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptomeria Cipher
The Cryptomeria cipher, also called C2, is a Proprietary software, proprietary block cipher defined and licensed by the 4C Entity. It is the successor to Content Scramble System, CSS algorithm (used for DVD#DVD Video, DVD-Video) and was designed for the Content Protection for Recordable Media, CPRM/CPPM digital rights management scheme which are used by DRM-restricted Secure Digital cards and DVD-Audio discs. Cipher details The C2 symmetric key algorithm is a 10-round Feistel cipher. Like Data Encryption Standard, DES, it has a key size of 56 bits and a Block size (cryptography), block size of 64 bits. The encryption and decryption algorithms are available for peer review, but implementations require the so-called "secret constant", the values of the substitution box (S-box), which are only available under a license from the 4C Entity. The 4C Entity licenses a different set of S-boxes for each application (such as DVD-Audio, DVD-Video and CPRM). (Abstract is in German, rest is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SD Card
Secure Digital, officially abbreviated as SD, is a proprietary non-volatile flash memory card format developed by the SD Association (SDA) for use in portable devices. The standard was introduced in August 1999 by joint efforts between SanDisk, Panasonic (Matsushita) and Toshiba as an improvement over MultiMediaCards (MMCs), and has become the industry standard. The three companies formed SD-3C, LLC, a company that licenses and enforces intellectual property rights associated with SD memory cards and SD host and ancillary products. The companies also formed the SD Association (SDA), a non-profit organization, in January 2000 to promote and create SD Card standards. SDA today has about 1,000 member companies. The SDA uses several trademarked logos owned and licensed by SD-3C to enforce compliance with its specifications and assure users of compatibility. History 1999–2003: Creation In 1999, SanDisk, Panasonic (Matsushita), and Toshiba agreed to develop and market t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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