What is css system

The full English name of the css system is "Content Scrambling System", which refers to the content scrambling system. It is a data encryption and authentication method that prevents video files from being copied directly from the disc.

The operating environment of this article: Windows 7 system, Dell G3 computer.

What is the css system?

Content Scrambling System is a data encryption and authentication method that prevents video files from being copied directly from discs. Each licensed person is given a key, which is drawn from the master set of keys on the encrypted disc. As soon as the key is removed from subsequent discs, the license becomes invalid.

Principle

The CSS decryption algorithm exchanges keys with the drive unit to generate keys for encryption. This generated key is used to disrupt the exchange of disc keys and program keys. The film and television program key is used to decrypt the data on the disc. DVD players with CSS circuitry first decrypt the data before decoding and playing it. If it is a computer, then the DVD decoding hardware and software must add a CSS decryption module. All DVD-ROM drives have an add-on firmware that exchanges authentication and decryption keys with the CSS module in the computer.

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