Authentication of content download

• US 7,891,014 B2
• Filed: 04/09/2009
• Issued: 02/15/2011
• Est. Priority Date: 07/28/2003
• Status: Active Grant

• Current Assignee: Limelight Networks, Inc.
• Original Assignee: Limelight Networks, Inc.
• Inventors: Raciborski, Nathan F.
• Primary Examiner(s): PYZOCHA, MICHAEL J
• Application Number:
  US12/421,533
• Publication Number:
  US 20090199013A1
• Time in Patent Office: 677 Days
• Field of Search: 713/176, 726/30, 714/799
• US Class Current: 726/30
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

According to the invention, a method for authenticating download of a number of digital content files ordered from a web site is disclosed. In one step, a selection of the digital content files is received with the web site. Download manager software, media information, the digital content files, and first codes for each of the digital content files are sent to the client computer. The media information indicates a location of each of the number of digital content files. A first code is calculated for each of the digital content files. If the client computer determines that the first code doesn'"'"'t match a second code for a particular digital content file, it is resent.

Claims

1. A computing device for authenticating download of a digital content file ordered by a client from a web site, the computing device comprising:

one or more hardware processors configured to;

send an indication of selection of the digital content file toward the web site via a network;

receive the digital content file via the network;

receive a first code via the network, the first code indicative of at least a portion of the digital content file, wherein if the portion of the digital content file is changed, the first code changes, and further wherein the first code is unique to the client;

receive a media identifier, wherein;

the media identifier comprises a unique code, and

the unique code correlating;

the digital content file to license information and

the digital content file to the client;

calculate a second code with the portion of the digital content file a repeated number of times;

check if the second code corresponds to the first code after each calculation; and

receive at least the portion of the digital content file again if the check fails.

2. The computing device for authenticating download of the digital content file ordered by the client from the web site as recited in claim 1, wherein the one or more hardware processors are further configured to:

when a new version of the digital content file is available;

receive a new first code indicative of the new version of the portion of the digital content file, wherein;

if the new version of the portion of the digital content file is changed, the new first code changes, and

the new first code is unique to the client,

calculate the second code with the portion of the digital content file during one of the repeated calculations of the second code,

check if the second code that was calculated during one of the repeated calculations corresponds to the new first code, and

upon the second code that was calculated during one of the repeated calculations not matching the new first code, receiving the new version of at least the portion of the digital content file.

3. The computing device for authenticating download of the digital content file ordered by the client from the web site as recited in claim 1, wherein the one or more hardware processors are further configured to:

when a license for the digital content file expires;

receive a new first code different than the first code;

calculate the second code with the portion of the digital content file during one of the repeated calculations of the second code,

check if the second code that was calculated during one of the repeated calculations corresponds to the new first code, and

upon the second code that was calculated during one of the repeated calculations not matching the new first code, not receiving the digital content file.

4. The computing device for authenticating download of the digital content file ordered by the client from the web site as recited in claim 3, wherein the one or more hardware processors are further configured to prohibit use of the digital content file when the license for the digital content file expires.

5. A computing device for authenticating download of a digital content file ordered by a client from a web site, the computing device comprising:

one or more hardware processors configured to;

send an indication of selection of the digital content file toward the web site via a network;

receive the digital content file via the network;

receive a first code via the network, the first code indicative of at least a portion of the digital content file, wherein if the portion of the digital content file is changed, the first code changes, and further wherein the first code is unique to the client;

calculate a second code with the portion of the digital content file a repeated number of times;

check if the second code corresponds to the first code after each calculation;

receive at least the portion of the digital content file again if the check fails; and

when a new version of the digital content file is available;

receive a new first code indicative of the new version of the portion of the digital content file, wherein;

if the new version of the portion of the digital content file is changed, the new first code changes, and

the new first code is unique to the client,

calculate the second code with the portion of the digital content file during one of the repeated calculations of the second code,

check if the second code that was calculated during one of the repeated calculations corresponds to the new first code, and

upon the second code that was calculated during one of the repeated calculations not matching the new first code, receiving the new version of at least the portion of the digital content file.

6. The computing device for authenticating download of the digital content file ordered by the client from the web site as recited in claim 5, wherein the one or more hardware processors are further configured to:

when a license for the digital content file expires;

receive a new first code different that the first code,

calculate the second code with the portion of the digital content file during one of the repeated calculations of the second code,

check if the second code that was calculated during one of the repeated calculations corresponds to the new first code, and

upon the second code that was calculated during one of the repeated calculations not matching the new first code, not receiving the digital content file.

7. The computing device for authenticating download of a digital content file ordered by a client from a web site as recited in claim 5, wherein the one or more hardware processors are further configured to store the digital content file in memory before calculating the second code.

8. The computing device for authenticating download of a digital content file ordered by a client from a web site as recited in claim 7, wherein the one or more hardware processors are further configured to report where the digital content file was stored to a location away from the computing device.

9. A method for authenticating download of a digital content file ordered from a web site, the method comprising steps of:

receiving a selection of the digital content file with the web site from a client;

calculating a first code indicative of at least a portion of the digital content file, wherein if the portion of the digital content file is changed, the first code changes, and further wherein the first code is unique to the client;

sending the digital content file to a client computer;

sending the first code to the client computer, wherein the client computer is configured to calculate a second code indicative of the portion of the digital content file a repeated number of times after download;

sending a media identifier to the client computer, wherein;

the media identifier comprises a unique code, and

the unique code correlating the digital content file to license information and correlating the digital content file to the client;

storing the media identifier in a remote database cross-referenced to each of;

the digital content file,

the client, and

the license information; and

re-sending the digital content file if the client computer determines the first code doesn'"'"'t match the second code.

10. The method for authenticating download of the digital content file ordered from the web site as recited in claim 9, further comprising steps of:

when a new version of the digital content file is available;

calculating a new first code indicative of the new version of the portion of the digital content file, wherein;

if the new version of the portion of the digital content file is changed, the new first code changes, and

the new first code is unique to the client,

sending the new first code to the client computer, and

sending the new version of the digital content file to the client computer when the client computer determines, during one of the repeated calculations of the second code, that the new first code doesn'"'"'t match the second code.

11. The method for authenticating download of the digital content file ordered from the web site as recited in claim 9, further comprising steps of:

when a license for the digital content file expires, performing the steps of;

replacing the first code with a different first code, wherein the different first code is different than the first code,

sending the different first code to the client computer, and

not sending the digital content file when the client computer determines, during one of the repeated calculations of the second code, that the different first code doesn'"'"'t match the second code.

12. The method for authenticating download of the digital content file ordered from the web site as recited in claim 9, wherein the client comprises multiple individuals with individual computers, and the previous steps are repeated for the individual users and the individual computers, and further wherein the first code is identical for each individual user.

13. The method for authenticating download of the digital content file ordered from the web site as recited in claim 9, wherein the client comprises multiple individuals with individual computers and the previous steps are repeated for the individual users and the individual computers, and further wherein the first code is unique to each individual user.

14. A computer-system adapted to perform the computer-implementable method for authenticating download of the digital content file ordered from the web site of claim 9, wherein at least one of the steps is performed by a processor, and the processor is coupled to a memory.

15. A non-transitory computer-readable storage medium having computer-executable instructions for performing the computer-implementable method for authenticating download of the digital content file ordered from the web site of claim 9.

16. A method for authenticating download of a digital content file ordered from a web site, the method comprising steps of:

receiving a selection of the digital content file with the web site from a client;

calculating a first code indicative of at least a portion of the digital content file, wherein if the portion of the digital content file is changed, the first code changes, and further wherein the first code is unique to the client;

sending the digital content file to a client computer;

sending the first code to the client computer, wherein the client computer is configured to calculate a second code indicative of the portion of the digital content file a repeated number of times after download;

re-sending the digital content file if the client computer determines the first code doesn'"'"'t match the second code; and

when a new version of the digital content file is available;

calculating a new first code indicative of the new version of the portion of the digital content file, wherein;

if the new version of the portion of the digital content file is changed, the new first code changes, and

the new first code is unique to the client,

sending the new first code to the client computer, and

sending the new version of the digital content file to the client computer when the client computer determines, during one of the repeated calculations of the second code, that the new first code doesn'"'"'t match the second code.

17. The method for authenticating download of the digital content file ordered from the web site as recited in claim 16, further comprising steps of:

when a license for the digital content file expires, performing the steps of;

replacing the first code with a different first code, wherein the different first code is different than the first code,

sending the different first code to the client computer, and

not sending the digital content file when the client computer determines, during one of the repeated calculations of the second code, that the different first code doesn'"'"'t match the second code.

18. The method for authenticating download of the digital content file ordered from the web site as recited in claim 16, wherein the client comprises multiple individuals with individual computers, and the previous steps are repeated for the individual users and the individual computers, and further wherein the first code is identical for each individual user.

19. A computer-system adapted to perform the computer-implementable method for authenticating download of the digital content file ordered from the web site of claim 16, wherein at least one of the steps is performed by a processor, and the processor is coupled to a memory.

20. A non-transitory computer-readable storage medium having computer-executable instructions for performing the computer-implementable method for authenticating download of the digital content file ordered from the web site of claim 16.

21. A method for authenticating download of a digital content file ordered from a web site, the method comprising steps of:

receiving a selection of the digital content file with the web site from a client;

calculating a first code indicative of at least a portion of the digital content file, wherein if the portion of the digital content file is changed, the first code changes, and further wherein the first code is unique to the client;

sending the digital content file to a client computer;

sending the first code to the client computer, wherein the client computer is configured to calculate a second code indicative of the portion of the digital content file a repeated number of times after download;

re-sending the digital content file if the client computer determines the first code doesn'"'"'t match the second code; and

when a license for the digital content file expires, performing the steps of;

replacing the first code with a different first code, wherein the different first code is different than the first code,

sending the different first code to the client computer, and

not sending the digital content file when the client computer determines, during one of the repeated calculations of the second code, that the different first code doesn'"'"'t match the second code.

22. The method for authenticating download of the digital content file ordered from the web site as recited in claim 21, wherein the client comprises multiple individuals with individual computers, and the previous steps are repeated for the individual users and the individual computers, and further wherein the first code is identical for each individual user.

23. A computer-system adapted to perform the computer-implementable method for authenticating download of the digital content file ordered from the web site of claim 21, wherein at least one of the steps is performed by a processor, and the processor is coupled to a memory.

24. A non-transitory computer-readable storage medium having computer-executable instructions for performing the computer-implementable method for authenticating download of the digital content file ordered from the web site of claim 21.