Metering accessing of content and the like in a content protection system or the like

• US 7,266,569 B2
• Filed: 04/23/2004
• Issued: 09/04/2007
• Est. Priority Date: 04/23/2004
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Strom, Clifford P., Evans, Brian P., Cutter, Benjamin Brooks, Parks, Michael Jay
• Primary Examiner(s): Cottingham; John
• Assistant Examiner(s): Lu; Kuen S
• Application Number:
  US10/830,632
• Publication Number:
  US 20060010076A1
• Time in Patent Office: 1,229 Days
• Field of Search: 707/104.1, 707/10, 713/200, 705/7
• US Class Current: 1/1
• 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: G06F 2221/2135 Metering
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing
• CPC Class Codes: Y10S 707/99948 Application of database or data structure, e.g. distributed, multimedia, or image

Abstract

Metered data is accumulated and is indexed within a metering database of a client according to a metering ID (MID) and a content-associated ID (KID). The client selects a particular MID and metered data in the metering database having the selected MID, and constructs a challenge based on the selected metered data and sends same to a metering service. The metering service obtains the metered data from the challenge, stores same, and constructs a response. The client receives the response including a list of KIDs of the selected metered data in the challenge, and processes the list of KIDs by, for each KID in the list, deleting the metered data from the metering database having the selected MID and the KID.

Claims

1. A method of reporting out accumulated metered data from a client to a metering service, each piece of metered data being indexed within a metering database of the client according to a metering ID (MID) and being sub indexed within the metering database according to a content-associated ID (KID),

the method comprising the client:

selecting a particular MID;

selecting at least a portion of the metered data in the metering database having the selected MID, the selected metered data being organized according to KID;

constructing a challenge based on the selected metered data;

sending the constructed challenge to the metering service, whereby the metering service obtains the metered data from the challenge, stores same, and constructs a response to be returned to the client based on the challenge;

receiving the response from the metering service including a list of KIDs of the selected metered data in the challenge;

confirming that the response corresponds to the challenge; and

processing the list of KIDs in the response by, for each KID in the list, deleting the metered data from the metering database having the selected MID and the KID,

wherein the challenge is constructed to include;

the MID;

an identification of a location of the metering service;

a transaction ID (TID) selected for the challenge; and

the selected metered data, wherein the selected metered data is encrypted according to a symmetric pass key to result in (pass key(metereddata)), and to further include the pass key encrypted according to a public key (PU-M) of the metering service to result in (PUM(passkey)), whereby the metering service can apply a private key (PR-M) corresponding to (PU-M) to (PU-M(passkey)) from the challenge to obtain the pass key, can apply the obtained pass key to (pass key(metereddata)) from the challenge to obtain the metered data, and can then store the obtained metered data.

2. The method of claim 1 comprising constructing the challenge to further include a hash value derived from a hash of at least a portion of the challenge based on the pass key, whereby if the at least a portion of the challenge is thereafter modified the hash value will fail to verify, and whereby the metering service can verify the hash value from the challenge based on the pass key.

3. The method of claim 1 comprising constructing the challenge to further include a set partial data flag if the client is not able to construct the challenge to contain all accumulated metered data in the metering database for the selected MID.

4. The method of claim 1 comprising receiving the response including:

a MID as was set forth in the challenge;

a transaction ID (TID) as was set forth in the challenge; and

at least a portion of the selected metered data as was set forth in the challenge.

5. The method of claim 4 comprising receiving the response including a list of the KIDs of the at least a portion of the selected metered data.

6. The method of claim 4 comprising receiving the response including the at least a portion of the selected metered data encrypted according to a symmetric pass key to result in (passkey(metereddata)), and further comprising the client obtaining the pass key and applying the obtained pass key to (passkey(metereddata)) from the response to obtain the at least a portion of the metered data.

7. The method of claim 6 comprising receiving the challenge further including a hash value derived from a hash of at least a portion of the response based on the pass key, and further comprising the client verifying the hash value from the response based on the pass key.

8. The method of claim 4 comprising receiving the response further including a set partial data flag if the challenge included a set partial data flag, such set partial data flag signifying that the client was not able to construct the challenge to contain all accumulated metered data in the metering database for the selected MID, and that the client thus has additional metered data to be reported out to the metering service with regard to the selected MID of the challenge.

9. The method of claim 8 further comprising, if the response includes the set partial data flag:

selecting at least a portion of the additional metered data in the metering database having the selected MID;

constructing an additional challenge based on the selected additional metered data; and

sending the constructed additional challenge to the metering service.

10. The method of claim 4 wherein confirming that the response corresponds to the challenge comprises confirming that the TID and the MID in the response match a TO stored in the metering database with the selected MID.

11. The method of claim 1 further comprising retrieving a transaction ID (TID) stored in the metering database according to the selected MID and constructing the challenge to include the TID, receiving the response form the metering service further including the TID, and upon processing the list of KIDs in the response, generating a new TO for a next challenge for the MID and storing the generated TID in the metering database according to the selected MID for retrieval and use in connection with the next challenge for the MID.

12. A method of reporting out accumulated metered data from a client to a metering service, each piece of metered data being indexed within a metering

database of the client according to a metering ID (MID) and being sub-indexed within the metering database according to a content-associated ID (KID), the method comprising the client:

selecting a particular metering certificate and determining therefrom a MID set forth therein;

selecting at least a portion of the metered date in the metering database having the determined MID from the selected metering certificate, the selected metered data being organized according to KID;

constructing a challenge based on the selected metered data and the selected metering certificate;

sending the constructed challenge to the metering service, whereby the metering service obtains the metered data from the challenge, stores same, and constructs a response to be retuned to the client based on the challenge;

receiving the response from the metering service including a list of KIDs of the selected metered data in the challenge;

confirming that the response corresponds to the challenge; and

processing the list of KIDs in the response by, for each KID in the list, deleting the metered data from the metering database having the determined MID and the KID,

wherein the challenge is constructed to include;

the MID from the metering certificate;

an identification of a location of the metering service from the metering certificate;

a transaction ID (TID) selected for the challenge; and

the selected metered data, wherein the selected metered data is encrypted according to a symmetric pass key to result in (pass key(metereddata)), and to further include the pass key encrypted according to a public key (PU-M) from the metering certificate to result in (PUM(passkey)), whereby the metering service can apply a private key (PR-M) corresponding to (PU-M) to (PU-M(passkey)) from the challenge to obtain the pass key, can apply the obtained pass key to (pass key(metereddata)) from the challenge to obtain the metered data, and can then store the obtained metered data.

13. The method of claim 12 comprising constructing the challenge to further include a set partial data flag if the client is not able to construct the challenge to contain all accumulated metered data in the metering database for the determined MID from the selected metering certificate.

14. The method of claim 12 comprising receiving the response including:

a MID as was set forth in the challenge;

a transaction ID (TID) as was set forth in the challenge; and

at least a portion of the selected metered data as was set forth in the challenge.

15. The method of claim 14 comprising receiving the response further including a set partial data flag if the challenge included a set partial data flag, such set partial data flag signifying that the client was not able to construct the challenge to contain all accumulated metered data in the metering database for the determined MID from the selected metering certificate, and that the client thus has additional metered data to be reported out to the metering service with regard to the determined MID of the challenge.

16. The method of claim 15 further comprising, if the response includes the set partial data flag:

selecting at least a portion of the additional metered data in the metering database having the determined MID from the selected metering certificate;

constructing an additional challenge based on the selected additional metered data and the selected metering certificate; and

sending the constructed additional challenge to the metering service.