Key management system for DVD copyright management

A method of producing a disc having secure content, the method comprising the steps of:

• a) selecting a first key;
• b) encrypting data with the first key;
• c) compressing the encrypted data;
• d) encrypting the first key with a second key;
• e) writing the compressed, encrypted data to a first portion of the disc;
• and
• f) writing the encrypted first key to a second portion of the disc;
• wherein the second portion of the disc is out of band.

A method of securely converting compressed, encrypted digital video data to video signals suitable for driving a video display, comprising the steps of:

• a) within a DVD drive, decrypting at least one encrypted content key wherein decrypting includes reading an out of band portion of a disc;
• b) within the DVD drive, encrypting at least one content key with a video controller public key;
• c) communicating at least one content key encrypted with the video controller public key, from the DVD drive to a video controller;
• d) communicating compressed, encrypted video data from DVD drive to a decoder;
• e) within the decoder, decompressing the compressed, encrypted video data;
• f) communicating the encrypted video from the decoder to the video controller;
• g) within the video controller, decrypting the content key with a video controller private key;
• and
• h) generating and communicating video signals to the video display.