|
Content Scramble System (CSS) is a Digital Rights Management (DRM) scheme used on almost all commercially produced DVD-Video discs. It utilizes a relatively weak, proprietary 40-bit stream cipher algorithm. The system was introduced around 1996 and has subsequently been compromised. Digital rights management (DRM) is an umbrella term that refers to access control technologies used by publishers and other copyright holders to limit usage of digital media or devices. ...
DVD (also known as Digital Versatile Disc or Digital Video Disc) is a popular optical disc storage media format. ...
Proprietary indicates that a party, or proprietor, exercises private ownership, control or use over an item of property, usually to the exclusion of other parties. ...
40-bit encryption is a key size for symmetric encryption representing a low-level of security where the key is forty bits in length (five bytes). ...
The operation of the keystream generator in A5/1, a LFSR-based stream cipher used to encrypt mobile phone conversations. ...
The CSS key sets are licensed to manufacturers who incorporate them into products such as DVD drives, DVD players and DVD movie releases. Most DVD players are equipped with a CSS Decryption module. CSS key is a collective term for authentication key, disc key, player key, title key, second disk key set, and/or encrypted key. DVD is an optical disc storage media format that is used for playback of movies with high video and sound quality and for storing data. ...
The inside of a DVD player A DVD player is a device not only playing discs produced under the DVD Video standard but also playing discs under the standard of DVD Audio. ...
In October 1999, Jon Lech Johansen and two people who remained anonymous reverse engineered the algorithm and DeCSS was released. The CSS algorithm was soon revealed to be easily susceptible to a brute force attack. The weakness of the protection is due to US government crypto-export regulations, apart from being an example of the trusted client problem. The CSS algorithm has been superseded by the Cryptomeria cipher in newer DRM schemes such as CPRM/CPPM, or by AES in the AACS copy-protection schemed used by HD DVD and Blu-ray Disc. Jon Johansen (DVD Jon) Jon Lech Johansen (born November 18, 1983 in Harstad, Norway), also known as DVD Jon, is a Norwegian (his father is Norwegian and mother is Polish) who is famous for his work on reverse engineering data formats. ...
Reverse engineering (RE) is the process of taking something (a device, an electrical component, a software program, etc. ...
DeCSS is a computer program capable of decrypting content on a DVD video disc encrypted using the Content-Scrambling System (CSS). ...
The EFFs US$250,000 DES cracking machine contained over 1,800 custom chips and could brute force a DES key in a matter of days — the photograph shows a DES Cracker circuit board fitted with several Deep Crack chips. ...
In computing, a trusted client is a device or program controlled by the user of a service, but with restrictions designed to prevent its use in ways not authorised by the provider of the service. ...
The Cryptomeria cipher, commonly refered to as C2 is a proprietary block cipher defined and licensed by the 4C Entity. ...
CPRM or Content Protection for Recordable Media is a mechanism for controlling the copying, moving and deletion of digital media on a host device, such as a personal computer, or other digital player. ...
CPRM or Content Protection for Recordable Media is a mechanism for controlling the copying, moving and deletion of digital media on a host device, such as a personal computer, or other digital player. ...
In cryptography, the Advanced Encryption Standard (AES), also known as Rijndael, is a block cipher adopted as an encryption standard by the U.S. government. ...
The Advanced Access Content System (AACS) is a standard for content distribution and digital rights management, intended to restrict access to and copying of the next generation of optical discs and DVDs. ...
HD-DVD disc HD DVD (for High Density Digital Versatile Disc) is a digital optical media format which is being developed as one standard for high-definition DVD. HD DVD is similar to the competing Blu-ray Disc, which also uses the same CD sized (120 mm diameter) optical data...
A Blu-ray Disc (also called BD) is a high-density optical disc format for the storage of digital information, including high-definition video. ...
Specification
Authentication is a process for a DVD drive and CSS Decryption module to recognize (or authenticate) each other. It is necessary before reading data from DVDs. Authentication keys are used for this process. DVD is an optical disc storage media format that is used for playback of movies with high video and sound quality and for storing data. ...
Title keys are used for scrambling and descrambling actual data on DVDs called titles. A title could be a complete motion picture, a trailer or similar self-contained unit. DVD (also known as Digital Versatile Disc or Digital Video Disc) is a popular optical disc storage media format. ...
Disc keys are used for decrypting title keys on DVDs.
Player keys are used for decrypting disc keys on DVDs. Each DVD player manufacturer is allocated one of approximately 400 player keys to incorporate in its players.
While most CSS decrypting software is used to play DVD films, other non-playing software (such as DVD Decrypter, AnyDVD, DVD43, Smartripper and DVD Shrink) allows a region-specific DVD to be copied as an all-region DVD. Such software is also able to remove Macrovision, Content Scrambling System (CSS), region codes, and disabled user operations (UOPs). DVD Decrypter is a software application that can create backup disc images of the DVD-Video structure of DVDs. ...
AnyDVD is a Microsoft Windows driver that decrypts and removes content restriction from DVDs on-the-fly. ...
DVD43 is a CSS encryption breaking program that works behind the scenes of DVD copying programs so that they can read and copy copy-protected DVDs. ...
There are very few or no other articles that link to this one. ...
DVD Shrink is a freeware program for Microsoft Windows that facilitates backing up DVD movies. ...
Macrovision is a company that creates electronic copy prevention schemes, established in 1983. ...
Regional lockout is the programming practice, code, chip, or physical barrier used to prevent the playing of media designed for a device from the country where it is marketed on the version of the same device marketed in another country. ...
The user operation prohibition (abbreviated UOP) is a form of digital rights management used on video DVD discs. ...
See also The DVD Copy Control Association (DVD CCA) is an organization primarily responsible for the copy prevention of DVDs. ...
The Advanced Access Content System (AACS) is a standard for content distribution and digital rights management, intended to restrict access to and copying of the next generation of optical discs and DVDs. ...
DeCSS is a computer program capable of decrypting content on a DVD video disc encrypted using the Content-Scrambling System (CSS). ...
DVD Decrypter is a software application that can create backup disc images of the DVD-Video structure of DVDs. ...
There are very few or no other articles that link to this one. ...
libdvdcss is a free, highly portable library for accessing and unscrambling DVDs encrypted with the Content Scramble System. ...
CPRM or Content Protection for Recordable Media is a mechanism for controlling the copying, moving and deletion of digital media on a host device, such as a personal computer, or other digital player. ...
For fair use in trademark law, see Fair use (US trademark law). ...
In mathematics, the trigonometric functions are functions of an angle, important when studying triangles and modeling periodic phenomena. ...
References |
Feeds |
Contact