Protecting Card DVD Players
Most of the protecting card DVD players are work on algorithms. This is called Content Protection for Recordable Media and Pre-Recorded Media (CPRM/CPPM). The working of Algorithm is given in following paragraphs.
Content protection card for DVD player is a mechanism for controlling the copying, moving and deletion of digital media on a DVD Device. This mechanism may be applied to some other devices like computers and other digital players etc.
It is a form of Digital Right management (DRM) which is developed by 4C Entity, LLC which is supported and implemented by many multinationals.
The Content Protection for Recordable Media and Pre-Recorded Media Specification defines a renewable cryptographic method for protecting Video content when it recorded on DVD’s. The currently implemented method uses the Cryptographic cipher (i.e.C2 method) is a algorithm for symmetric encryption. The types of physical media supported which includes, flash memory note that the Content Protection for Recordable Media and Pre-Recorded Media specification is not limited to DVD media devices but it can be applicable to secure digital cards.
Advantages
The Content Protection for Recordable Media and Pre-Recorded Media Specification is designed to meet the robustness and renew ability of requirements of content owners with balancing the implementation needs of this technology. To accomplish these requirements the system defined by the specification relies on key management for interchangeable media, content encryption, and media-based renew ability.
There is some other controversial and widely misunderstood technologies that are Prepossessed to add generic key exchange commands (that can be implemented by The Content Protection for Recordable Media specification, Pre-Recorded Media and other Content protection technologies) to ATA specifications for removable hard drives were abandoned after year 2001.
The Content Protection for Recordable Media and Pre-Recorded Media specification is widely deployed in the popular secure digital card consumer-electronics flash memory format.
Security Enhancement
Till now The Content Protection for Recordable Media and Pre-Recorded Media Specification has not been broken. All the video and data inside DVD are saved. But By modifying commercial DVD (which can be Audio DVD) playback software to write the decrypted and decoded audio streams to the hard disk, users can, essentially, extract the content from DVD-Audio much in the same way they can from DVD-Video discs.
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