SYSTEM AND METHOD FOR STORING AND ACCESSING DIGITAL MEDIA CONTENT USING SMART CARD TECHNOLOGY

• US 20110197057A1
• Filed: 02/04/2011
• Published: 08/11/2011
• Est. Priority Date: 03/26/2001
• Status: Active Grant

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: KOCH, MARK J.
• Granted Patent: US 8,385,546 B2
• Time in Patent Office: Days
• US Class Current: 713/150
• CPC Class Codes: G06F 21/1014 to tokens
• CPC Class Codes: G06F 21/109 by using specially-adapted hardware at the client

Abstract

A system and method for delivering digital media content to a user over a network is disclosed. The illustrative embodiment of the present invention enables multiple types of electronic devices to access the same digital media content for the same end user through the use of a smart card equipped with a license for the digital media content. Depending on the format of the digital media content, devices such as phones, pagers, internet appliances or PDAs can be used to present the digital media content to a user, as can traditional consumer electronic devices such as DVD players and VCRs. The encrypted content may be freely transferred and stored without copyright concerns since the decryption key is generated by the smart card containing the license.

Claims

1. A method for delivering digital media content to a user, said method for use with a network, said network interfaced with a storage medium containing digital media content and further interface d with an electronic device, said method comprising the steps of:

providing a smart card that includes a license for said digital media content;

sending a request without using said smart card for said digital media content over said network from said electronic device;

receiving from said storage medium in response to said request said digital media content in encrypted form for storage on said electronic device, wherein said request is not verified;

extracting a cipher from said digital media content, said cipher being combined with a second cipher produced by said electronic device and sending the combined cipher to said smart card;

obtaining a decryption key for said combined cipher, said decryption key being transmitted from said smart card to said electronic device; and

using said decryption key and an embedded key located on said electronic device to decrypt said digital media content stored on said electronic device.

2. The method of claim 1, further comprising the step of:

presenting said digital media content to said user.

3. The method of claim 1, further comprising the step of:

limiting said license to said digital media content so that said decryption key stops working after a pre-defined number of uses.

4. The method of claim 1, further comprising the step of:

limiting said license to said digital media content so that said decryption key stops working after a pre-defined period of time.

5. The method of claim 1, further comprising the step of:

denoting as a reference point on said smart card a place in a stream of digital media content where said user stops accessing said digital media content.

6. The method of claim 5, further comprising the steps of:

sending a second request without using said smart card for said digital media content over said network from a second electronic device;

receiving from said storage medium in response to said second request said digital media content in encrypted form for storage on said second electronic device, wherein said second request is not verified;

extracting a third cipher from said digital media content, said third cipher being combined with a fourth cipher produced by said second electronic device into a second combined cipher and sending the second combined cipher to said smart card;

obtaining a second decryption key for said second combined cipher, said second decryption key being transmitted from said smart card to said second electronic device; and

using said second decryption key and a second embedded key located on said second electronic device to decrypt said digital media content stored on said second electronic device, wherein said reference point on said smart card is used to resume said digital media content on said second electronic device at the place in the stream of digital media content where said user stopped accessing said digital media content on said electronic device.

7. The method of claim 1, further comprising the step of:

denoting as reference points on said smart card each place in a stream of digital media content where each one of a plurality of users has stopped accessing said digital media content.

8. The method of claim 1, wherein said digital media content is audio.

9. The method of claim 1, wherein said digital media content is video.

10. The method of claim 1, wherein said digital media content has both audio and visual components.

11. The method of claim 1 wherein said digital media content contains text.

12. A method for delivering digital media content to a user, said method for use with a network, said network interfaced with a storage medium containing digital media content and further interfaced with an electronic device, said method comprising the steps of:

providing a smart card that includes a license for said digital media content;

sending a request without using said smart card for said digital media content over said network from said electronic device;

receiving from said storage medium in response to said request said digital media content in encrypted form for storage on said electronic device, wherein said request is not verified;

extracting a first cipher from said digital media content;

generating, in said electronic device, a second cipher from the current device session;

combining, in said electronic device, said first cipher and second cipher into a combined cipher;

sending said combined cipher to said smart card;

obtaining a decryption key for said combined cipher, said decryption key being transmitted from said smart card to said electronic device; and

using said decryption key and an embedded key located on said electronic device to decrypt said digital media content stored on said electronic device.

13. The method of claim 12, further comprising the step of:

limiting said license to said digital media content so that said decryption key stops working after a pre-defined number of uses.

14. The method of claim 12, further comprising the step of:

limiting said license to said digital media content so that said decryption key stops working after a pre-defined period of time.

15. A method for delivering digital media content, said method for use with a network, said network interfaced with a storage medium containing digital media content and further interfaced with an electronic device, said method comprising the steps of:

providing a smart card for storing decryption keys for digital media content;

storing, in response to a user purchase of digital media content, a decryption key for said digital media content on said smart card;

sending a request without using said smart card for said digital media content over said network from said electronic device;

receiving from said storage medium in response to said request said digital media content in encrypted form for storage on said electronic device, wherein said request is not verified;

extracting a cipher from said digital media content, said cipher being combined with a second cipher produced by said electronic device and sending the combined cipher to said smart card;

obtaining said decryption key in response to said combined cipher, said decryption key being transmitted from said smart card to said electronic device; and

using said decryption key and an embedded key located on said electronic device to decrypt said digital media content stored on said electronic device.

16. The method of claim 15, further comprising the step of:

presenting said digital media content to said user.

17. The method of claim 15, further comprising the step of:

limiting a license to said digital media content so that said decryption key stops working after a pre-defined number of uses.

18. The method of claim 15, further comprising the step of:

denoting as a reference point on said smart card a place in a stream of digital media content where said user stops accessing said digital media content.

19. The method of claim 15, further comprising the steps of:

storing, in response to a purchase by said user of a second digital media content, a second decryption key for said second digital media content; and

denoting as a second reference point on said smart card a place in a stream of said second digital media content where said user stops accessing said second digital media content.

20. The method of claim 15, further comprising the step of:

denoting as reference points on said smart card each place in a stream of digital media content where each one of a plurality of users has stopped accessing said digital media content.