System for secure distribution and playback of digital data

• US 6,865,550 B1
• Filed: 02/03/2000
• Issued: 03/08/2005
• Est. Priority Date: 02/03/2000
• Status: Expired due to Term

• Current Assignee: Monument Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Eastman Kodak Company
• Inventors: Cok, Ronald S.
• Primary Examiner(s): Trammell, James P.
• Assistant Examiner(s): CHEUNG, MARY DA ZHI WANG
• Application Number:
  US09/498,379
• Time in Patent Office: 1,860 Days
• Field of Search: 705 50- 52, 713156-182, 380200-201, 380277-286, 380 44- 47, 380 28- 30
• US Class Current: 705/51
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06Q 30/06 Buying, selling or leasing transactions

Abstract

A method and system for secure distribution and access to digital data, includes providing a plurality of system components; associating a plurality of unique identifiers with different components of the system; and controlling access by the system to the digital data based on a correspondence between the unique identifiers.

Claims

1. A method for secure distribution and access to digital data, comprising:

a) providing an encryption key set having an encryption key and a decryption key that can be divided into multiple parts, each part of which is associated with a component of a secure distribution system;

b) encrypting the digital data with the encryption key to produce encrypted digital data;

c) supplying the encrypted digital data along with a first part of the decryption key that is associated with the digital data to a playback device;

d) supplying a second part of the decryption key that is associated with the playback device to the playback device; and

e) combining the parts of the decryption keys in the playback device and using the combined decryption key to decrypt the encrypted digital data.

2. The method claimed in claim 1, wherein the digital data and the first part of the decryption key is supplied to the playback device on a medium, and further comprising the steps of embedding a third part of the decryption key that is associated with the medium in the medium.

3. A system for secure distribution and access to digital data, comprising:

a) a plurality of system components;

b) an encryption key set having an encryption key and a decryption key that can be divided into multiple parts, wherein a part of the decryption key is associated with each of the system components;

c) means for encrypting the digital data using the encryption key; and

d) means for receiving and combining the parts of the decryption key and decrypting the encrypted digital data.

4. The system claimed in claim 3, wherein the system components include the digital data, and a playback device, and wherein the playback device includes the means for receiving and combining the parts of the decryption key and decrypting the encrypted digital data.

5. The system claimed in claim 4, wherein the part of the decryption key associated with the digital data is embedded in the digital data, and the part of the decryption key associated with the playback device is stored in the playback device.

6. The system claimed in claim 5, wherein the system components further include a digital data medium on which is recorded one of the parts of the decryption key associated with the digital data medium.