High security media encryption

• US 20060039554A1
• Filed: 08/18/2004
• Published: 02/23/2006
• Est. Priority Date: 08/18/2004
• Status: Abandoned Application

• Current Assignee: Sonic Solutions (Adeia Inc.)
• Original Assignee: ROXIO Incorporated (MelodyVR Group Plc)
• Inventors: Fry, Gregory P.
• Application Number:
  US10/921,367
• Publication Number:
  US 20060039554A1
• Time in Patent Office: Days
• US Class Current: 380/29
• CPC Class Codes: H04L 2209/08 Randomization, e.g. dummy operations or using noise
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 9/0618 Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation

Abstract

A method for encrypting a block-based removable media includes identifying a file system for the media, and receiving a selection of data to be written to the media. The identified file system designates specific logical block addresses for file system structures and files which enable the media to mount and enable the locating of recorded data on the media. When recording the block-based removable media, logical block addresses for blocks containing both file system structures and files as well as blocks containing the selection of data are randomized throughout the block based removable media. A decryption key is required to first locate the file system and enable the media to mount, and ultimately to locate and access the selection of data recorded thereon.

Claims

1. A method for encrypting a block-based removable media, comprising:

receiving a selection of data to write to the block-based removable media;

identifying true logical block addresses on the block-based removable media to which the selection of data will be associated;

assigning encrypted logical block addresses according to a first encryption algorithm, the encrypted logical block addresses having corresponding unencrypted true logical block addresses; and

writing the selection of data to the block-based removable media, the writing being to the encrypted logical block addresses,

wherein when the selection of data is located on the block-based removable media according to the true logical block addresses, the block-based removable media is enabled to provide access to the selection of data recorded thereon.

2. The method of claim 1, further comprising:

encrypting the selection of data according to a second encryption algorithm, wherein locating the selection of data is enabled by decryption according to the first encryption algorithm and access to the selection of data is enabled by decryption according to the second encryption algorithm.

3. The method of claim 1, wherein the block-based removable media is CD media.

4. The method of claim 1 wherein the block-based removable media is DVD media.

5. The method of claim 1, further comprising:

identifying a file system to define the block-based removable media; and

writing the file system to the block-based removable media, the writing being according to the encrypted logical block addresses.

6. The method of claim 5, wherein the file system is Universal Disc Format (UDF).

7. The method of claim 1, wherein the first encryption algorithm is implemented in hardware, the hardware being a computing chip implemented in a media recording device.

8. The method of claim 2, wherein the second encryption algorithm is implemented in software.

9. The method of claim 5, wherein the writing of the file system and the selection of data to the block-based removable media is accomplished by packet writing.

10. A method for encrypting a block-based removable media, comprising:

identifying a file system for the block-based removable media;

identifying a selection of data to write to the block-based removable media;

identifying physical block locations on the block-based removable media to which the file system and the selection of data will be associated, the physical block locations being identified according to the identified file system;

assigning encrypted physical block locations according to a first encryption algorithm with each physical block location identified for the file system and the selection of data corresponding to an encrypted physical block location; and

writing the file system and the selection of data to the block-based removable media, the writing being to the encrypted physical block locations,

wherein when the file system and the selection of data are located according to the physical block location, the block-based removable media is enabled to provide access to the selection of data recorded thereon.

11. The method of claim 10, further comprising:

encrypting the selection of data according to a second encryption algorithm, wherein locating the file system and the selection of data is enabled by decryption according to the first encryption algorithm and access to the selection of data is enabled by decryption according to the second encryption algorithm.

12. The method of claim 10, wherein the block-based removable media is CD media.

13. The method of claim 10 wherein the block-based removable media is DVD media.

14. The method of claim 10, wherein the file system is Universal Disc Format (UDF).

15. The method of claim 10, wherein the writing of the file system and the selection of data to the block-based removable media is accomplished by packet writing.

16. Computer readable media having program instructions for encrypting removable media, the computer readable media comprising:

program instructions for preparing a selection of data to write to the removable media;

program instructions for identifying true logical block addresses on the removable media to which the selection of data will be associated;

program instructions for assigning encrypted logical block addresses according to a first encryption algorithm with each true logical block address identified for the selection of data corresponding to an encrypted logical block address; and

program instructions for writing the selection of data to the removable media, the writing being to the encrypted logical block addresses,

wherein when the selection of data is located according to the true logical block addresses, the removable media is enabled to provide access to the selection of data recorded thereon.

17. The computer readable media according to claim 16, further comprising:

program instructions for defining a file system on the removable media;

program instructions for identifying true logical block addresses on the removable media to which the file system will be associated; and

program instructions for assigning encrypted logical block addresses according to a first encryption algorithm with each true logical block address identified for the file system corresponding to an encrypted logical block address.

18. The computer readable media according to claim 16, further comprising:

program instructions for encrypting the selection of data according to a second encryption algorithm, wherein locating the selection of data is enabled by decryption according to the first encryption algorithm and access to the selection of data is enabled by decryption according to the second encryption algorithm.

19. The computer readable media according to claim 17, further comprising:

program instructions for defining the file system and writing the selection of data to the removable media by packet writing.

20. The computer readable media according to claim 17, wherein the file system is UDF.

21. A method for encrypting data written to optical media, comprising:

receiving a selection of data to write to the optical media;

identifying true logical block addresses on the optical media to which the selection of data will be associated;

defining encrypted logical block addresses according to a first encryption algorithm, the encrypted logical block addresses having corresponding unencrypted true logical block addresses;

writing the selection of data to the optical media, the writing being to the encrypted logical block addresses; and

identifying the optical media as encrypted, the identifying including defining a field in a first Lead-In of the optical media to identify the optical media as encrypted,

wherein when the selection of data is located on the optical media according to the true logical block addresses, the optical media is enabled to provide access to the selection of data recorded thereon.

22. The method of claim 21, further comprising:

encrypting the selection of data according to a second encryption algorithm, wherein locating a file system and the selection of data is enabled by decryption according to the first encryption algorithm and access to the selection of data is enabled by decryption according to the second encryption algorithm.

23. The method of claim 21, wherein the optical media is CD media.

24. The method of claim 21 wherein the optical media is DVD media.