Local Content Security System

1 . A local content security system comprising:

(a) a broadcast medium reader, capable of reading a broadcast medium containing encrypted broadcast content encrypted using a broadcast encryption key;

(b) a local key generator capable of generating at least one local key set, said local key set containing:

(i) a local encryption key; and

(ii) a local decryption key;

(c) a local content security processor including:

(i) a broadcast receiver capable of receiving said encrypted broadcast content;

(ii) an encrypted content decryptor, capable of generating decrypted content by decrypting said encrypted broadcast content using a broadcast decryption key, said broadcast decryption key capable of decrypting said encrypted broadcast content;

(iii) a local re-encrypter capable of generating local re-encrypted content by re-encrypting said decrypted content using at least one of said local encryption keys; and

(iv) a local re-encrypted content dispatcher;

(d) a trusted destination including:

(i) a local re-encrypted content receiver for receiving said local re-encrypted content from said local re-encrypted content dispatcher;

(ii) a local decryption key receiver for receiving said local decryption key from said local decryption key dispatcher; and

(iii) a local re-encrypted content decrypter, wherein said local re-encrypted content decrypter constructs processed content by decrypting said local re-encrypted content using said local decryption key;

(e) a local watermarker, capable of applying a local watermark to at least one of the following:

(i) said decrypted broadcast content; and

(ii) said encrypted broadcast content; and

(f) a content server.

2 . A local content security system according to claim 1 , wherein only said encrypted broadcast content and said processed content is available outside of said content security system.

3 . A local content security system according to claim 2 , wherein said local content security processor and said trusted destination are co-located.

4 . A local content security system according to claim 1 , wherein said local content security processor includes said local key generator.

5 . A local content security system according to claim 1 , wherein said local encryption key and said local decryption key are the same symmetric key.

6 . A local content security system according to claim 1 , further including a key mapper for associating at least one of said local key sets with said re-encrypted content.

7 . A local content security system according to claim 1 , wherein said content server is a video server.

8 . A local content security system according to claim 1 , wherein said content server further includes:

(a) a first interface for receiving said encrypted broadcast content;

(b) a second interface for interfacing with said local content security processor; and

(c) a third interface for interfacing with said trusted destination.

9 . A local content security system according to claim 7 , wherein said content server further includes at least one of the following:

(a) encrypted broadcast content storage;

(b) local re-encrypted content storage;

(c) encryption workspace storage; and

(d) a content server manager.

10 . A local content security system according to claim 1 , wherein said broadcast content is at least one of the following:

(a) digital cinema content;

(b) video content;

(c) multimedia content; and

(d) informational content.

11 . A local content security system according to claim 1 , wherein said trusted device further includes at least one of the following:

(a) a link encrypter; and

(b) a content processor.

12 . A local content security system according to claim 1 , further includes a content presenter.

13 . A local content security system according to claim 12 , wherein said content presenter is a digital projector.

14 . A local content security system according to claim 1 , wherein:

(a) said broadcast medium is an optical disc;

(b) said broadcast receiver is an optical disc drive.

15 . A local content security system according to claim 1 , wherein said local content security processor is integrated with said broadcast receiver.

16 . A local content security system according to claim 1 , wherein said trusted destination further includes a broadcast content decoder.

17 . A local content security system according to claim 16 , wherein said broadcast content decoder is an MPEG decoder.

18 . A method for providing local content security including the steps of:

(a) receiving encrypted broadcast content from a broadcast medium, said encrypted broadcast content encrypted using a broadcast encryption key;

(b) generating decrypted content by decrypting said broadcast content, using a broadcast decryption key;

(c) generating at least one local key, said local key set including:

(i) a local encryption key; and

(ii) a local decryption key;

(d) associating at least one of said local key sets with said re-encrypted content;

(e) generating re-encrypted content by re-encrypting said decrypted content using at least one of said local encryption keys;

(f) dispatching said local decryption key to a trusted device;

(g) dispatching said local re-encrypted content to said trusted device;

(h) generating processed content in said trusted device by decrypting said local re-encrypted content using said local decryption key;

(i) applying a local watermark to at least one of the following:

(i) said decrypted broadcast content;

(ii) said re-encrypted content; and

(iii) said processed content; and

(j) storing and retrieving at least one of the following:

(i) said encrypted broadcast content;

(ii) said local re-encrypted content; and

(iii) said partially re-encrypted content.

19 . A method according to claim 18 , wherein said local encryption key and said local decryption key are the same symmetric key.

20 . A method according to claim 18 , wherein said broadcast content is at least one of the following:

(a) digital cinema content;

(b) video content;

(c) multimedia content; and

(d) informational content.

21 . A method according to claim 18 , further including at least one of the following:

(a) the step of link encrypting said processed content;

(b) the step of content processing said processed content;

(c) the step of presenting said processed content; and

(d) the step of decoding said processed content.

22 . A method according to claim 18 , further including the step of presenting said processed content using a digital projector.

23 . A method according to claim 18 , further including the step of decoding said processed content using an MPEG decoder.