Digital content distribution and consumption

• US 8,359,654 B2
• Filed: 03/10/2008
• Issued: 01/22/2013
• Est. Priority Date: 01/02/2008
• Status: Active Grant

• Current Assignee: Western Digital Israel Limited (Western Digital Corporation)
• Original Assignee: Sandisk Technologies Incorporated (Western Digital Corporation)
• Inventors: Rave, Micha, Nochimowski, Alain
• Primary Examiner(s): Patel, Nirav B.
• Application Number:
  US12/045,472
• Publication Number:
  US 20090172400A1
• Time in Patent Office: 1,779 Days
• Field of Search: 726 26- 33, 711/5, 711/170, 711/172, 711/173, 705 50- 56, 380200-202
• US Class Current: 726/26
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 3/0604 Improving or facilitating administration, e.g. storage management
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0655 Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

Digital content distribution and consumption that provides the advantages of digital content being locally stored under user control while concurrently having the widest acceptance by legacy players/platforms (i.e., no need to perform complex software integration) while still remaining compatible with state of the art security in order to satisfy content provider requirements.

Claims

1. A method of acquiring and consuming protected digital content that is protected by a DRM scheme, the method comprising:

acquiring from a remote device, with a local storage device coupled to a host device, the protected digital content, wherein the protected digital content is acquired after a successful conclusion of a mutual authentication of the local storage device and the remote device, wherein the remote device is external to the host device and the local storage device and is included in a network, wherein the host device comprises a network interface providing the host device access to the network, and wherein acquiring the protected digital content comprises;

prompting the host device, with the remote device, to use the network interface to establish a communication path between the local storage device and the remote device, wherein once the communication path is established by the host device there is no further intervention by the host device except to maintain the communication path, or

prompting the host device, with the local storage device, to use the network interface to establish the communication path between the local storage device and the remote device, wherein once the communication path is established by the host device there is no further intervention by the host device except to maintain the communication path; and

logically interacting, with the local storage device, over the communication path with the remote device, wherein the logical interaction is invisible to the host device;

securely storing, with the local storage device, the acquired protected digital content in a memory array of the local storage device, wherein the acquiring and the securely storing are each in accordance with the DRM scheme and neither are initiated by a host device file system of the host device; and

consuming the protected digital content by,

converting at least some of the securely stored protected digital content into a digital data stream, and

streaming the digital data stream with the local storage device, wherein if the digital data stream is protected by the DRM scheme, the local storage device enforces a usage restriction associated with the DRM scheme;

wherein the local storage device streams the digital data stream to an agent external to the local storage device, and wherein when the usage restriction associated with the DRM scheme includes an access restriction, the external agent can process the digital data stream only if the external agent is an authenticated external agent having access credentials acceptable to the DRM scheme.

2. The method as recited in claim 1, wherein the protected digital content includes digital content and corresponding rights objects, and wherein the usage restriction includes preventing unauthorized copying of the protected digital content, or allowing a predetermined number of uses of the protected digital content.

3. The method as recited in claim 2, wherein the memory array further comprises:

a first portion managed by the host device file system that is visible to the host device file system; and

a second portion that is not managed by the host device file system and is invisible to the host device file system;

wherein securely storing the protected digital content further comprises;

storing encrypted digital content in the first portion of the memory array that is visible to the host device file system, and storing the rights objects corresponding to the digital content in the second portion of the memory array that is invisible to the host device file system.

4. The method as recited in claim 2, wherein the securely storing the protected digital content further comprises:

encrypting the protected digital content; and

storing the encrypted protected digital content in the first portion of the memory array that is visible to the host device file system.

5. The method as recited in claim 1, wherein the external agent resides in a second local storage device connected to the host device by way of an interface.

6. The method as recited in claim 1, wherein the external agent is a local digital media player renderer application running in the host device.

7. The method as recited in claim 1, wherein the logical interaction includes a remote device command that causes the remote device to send the protected digital content from the remote device to the local storage device and that compels the local storage device to store the protected digital content in the memory array, or wherein the logical interaction includes a local storage device command that causes the local storage device to request that the remote device send the digital content from the remote device to the local storage device.

8. The method as recited in claim 7, wherein converting at least some of the securely stored protected digital content into the digital data stream comprises:

reading the protected digital content from the memory array; and

arranging the protected digital content read from the memory array into at least one data stream.

9. The method as recited in claim 8, wherein streaming the protected digital content from the memory array with the local storage device comprises:

forming a streaming channel; and

streaming the protected digital content over the streaming channel.

10. The method as recited in claim 9, wherein when the DRM requires that the streaming channel be a secure streaming channel, forming the streaming channel comprises:

forming the secure streaming channel; and

streaming the protected digital content over the secure streaming channel.

11. The method as recited in claim 1, wherein the protected digital content is a digital media file that includes a MP3 audio file and/or a video file.

12. A local storage device for acquiring and consuming protected digital content that is protected by a DRM scheme, the local storage device comprising:

a host device/local storage device interface providing a communication path between the host device and the local storage device, the host device comprising a host device file system and a network interface providing the host device access to a network;

a memory array at least a portion of which is managed by the host device file system;

a controller in communication with the host device/local storage device interface and the memory array, the controller configured to;

acquire the protected digital content from a remote device that is external to the host device and the local storage device and is included in the network, wherein the controller acquires the protected digital content after a successful conclusion of a mutual authentication of the local storage device and the remote device, and wherein to acquire the protected digital content, the controller is further configured to logically interact over a communication path with the remote device after one of;

the remote device prompting the host device to use the network interface to establish a communication path between the local storage device and the remote device, wherein once the communication path is established by the host device there is no further intervention by the host device except to maintain the communication path, and

the local storage device prompting the host device to use the network interface to establish the communication path between the local storage device and the remote device, wherein once the communication path is established by the host device there is no further intervention by the host device except to maintain the communication path wherein the logical interaction is invisible to the host device;

securely store the protected digital content in the memory array, wherein the acquiring and the securely storing are each in accordance with the DRM scheme and neither are initiated by the HDFS; and

consume the protected digital content by;

converting at least some of the securely stored protected digital content into a digital data stream, and

streaming the digital data stream, wherein if the digital data stream is protected by the DRM scheme, the local storage device enforces a usage restriction associated with the DRM scheme.

13. The local storage device of claim 12, wherein the protected digital content includes digital content and corresponding rights objects, and wherein the usage restriction includes preventing unauthorized copying of the protected digital content, or allowing a predetermined number of uses of the protected digital content.

14. The local storage device of claim 13, wherein the memory array comprises:

a first portion managed by the host device file system that is visible to the host device file system; and

a second portion that is not managed by the host device file system and is invisible to the host device file system;

wherein to securely store the protected digital content, the controller is further configured to;

store encrypted digital content in the first portion of the memory array that is visible to the host device file system;

store the rights objects corresponding to the digital content in the second portion of the memory array that is invisible to the host device file system.

15. The local storage device of claim 13, wherein to securely store the protected digital content, the controller is further configured to:

encrypt the protected digital content; and

store the encrypted protected digital content in the first portion of the memory array that is visible to the HDFS.

16. The local storage device of claim 12, wherein the controller is further configured to stream the digital data stream to an agent external to the LSD, and

wherein if the restriction includes an access restriction, then the external agent can process the received digital data stream only if the external agent is an authenticated external agent having access credentials acceptable to the DRM scheme.

17. The local storage device of claim 16, wherein the authorized external agent is a digital media player renderer application running in an device external to the HD.

18. The local storage device of claim 16, wherein the authorized external agent is a local digital media player renderer application running in the HD.

19. The local storage device of claim 13, wherein the logical interaction includes a remote device command that causes the remote device to send the protected digital content from the remote device to the local storage device and that compels the local storage device to store the protected digital content in the memory array, or wherein the logical interaction includes a local storage device command that causes the local storage device to request that the remote device send the digital content from the remote device to the local storage device.

20. The local storage device of claim 19, wherein to stream the protected digital content, the controller is further configured to:

read the protected digital content from the memory array; and

arrange the protected digital content read from the memory array into at least one data stream.

21. The local storage device of claim 20, wherein to stream the protected digital content from the memory array, the controller is further configured to:

form a streaming channel; and

stream the protected digital content over the streaming channel.

22. The local storage device of claim 21, wherein if the DRM requires that the streaming channel be a secure streaming channel, to form the secure streaming channel, the controller is configured to:

form the secure streaming channel; and

stream the protected digital content over the secure streaming channel.

23. The local storage device of claim 12, wherein the protected digital content is a digital media file.

24. The local storage device of claim 23, wherein the digital media file is a MP3 audio file or a video file.