CA2590172A1 - Method and system for securing content in media systems - Google Patents

Method and system for securing content in media systems Download PDF

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Publication number
CA2590172A1
CA2590172A1 CA002590172A CA2590172A CA2590172A1 CA 2590172 A1 CA2590172 A1 CA 2590172A1 CA 002590172 A CA002590172 A CA 002590172A CA 2590172 A CA2590172 A CA 2590172A CA 2590172 A1 CA2590172 A1 CA 2590172A1
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CA
Canada
Prior art keywords
key
content
encryption element
encryption
media content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002590172A
Other languages
French (fr)
Other versions
CA2590172C (en
Inventor
William Helms
John Carlucci
James William Fahrny
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGNA LLC
Original Assignee
William Helms
John Carlucci
James William Fahrny
Ngna, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by William Helms, John Carlucci, James William Fahrny, Ngna, Llc filed Critical William Helms
Publication of CA2590172A1 publication Critical patent/CA2590172A1/en
Application granted granted Critical
Publication of CA2590172C publication Critical patent/CA2590172C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution

Abstract

A method and system for securing transfer, storage, and playback of media content. The method and system relate to securing transfer, storage, and playback of all types of media content, including television, music, electronic games, and other types of electronic data.

Claims (39)

1. A method of securing transfer, storage, and playback of media content stored on a first media access control point having a first security processor (SP) and a media content recorder (MCR), the first media access control point receiving media content from a content provider and delivering at least a portion of the received media content to the first SP, the first SP encrypting the media content for storage on the MCR and decrypting the stored media content for playback from the MCR, the method comprising:
encrypting the media content with a final content key, the final content key being determined by the first SP;
encrypting the final content key with a first SP public encryption key to create a first secured content key such that the final content key is recoverable by decrypting the first secured content key with a first SP private encryption key, the first SP public and first SP private encryption keys being associated with the first SP and stored thereon; and destroying the final content key such that the encrypted media content is undecryptable unless the first secured content key is decrypted with the first SP
private encryption key stored on the SP.
2. The method of claim 1 further comprising enhancing security of the final content key by creating the final content key based on a pre-content key and a metadata hash, the first SP creating the pre-content key from a random data generator, the SP hashing metadata associated with the media content to create the metadata hash.
3. The method of claim 2 further comprising creating the final content key by exclusive-ORing the pre-content key and the metadata hash.
4. The method of claim 2 wherein the random data generator comprises a random number generator.
5. The method of claim 2 wherein the random data generator comprises a random seed data generator.
6. The method of claim 1 further comprising associating the first secured content key with metadata associated with the media content to create a first security package having the first secured content key and the metadata.
7. The method of claim 6 further comprising enhancing security of the first security package by signing the first security package to create a first secured content group, wherein the first secured content group is associated with the first SP.
8. The method of claim 7 further comprising signing the first security package by hashing the first security package and encrypting the hashed first security package with a first SP private authentication key, wherein the first SP
private authentication key is associated with the first SP.
9. The method of claim 7 further comprising storing the first secured content group and the encrypted media content on the MCR.
10. The method of claim 9 further comprising receiving a request for playback of the encrypted media content stored on the MCR, locating the first secured content group associated with the requested media content, and providing the associated first secured content group to the first SP for decryption and recovery of the final content key for decrypting the requested media content.
11. The method of claim 10 further comprising authenticating the first secured content group prior to recovering the final content key with a first SP
public authentication key to ensure the metadata associated therewith is unaltered, wherein the first SP public authentication key is associated with the first SP
private authentication key.
12. The method of claim 11 further comprising recovering the final content key by decrypting the first secured content key included in the first security package with the first SP private encryption key.
13. The method of claim 10 further comprising decrypting the media content with the recovered final content key, the decrypted media content being sufficient for output to a media output device for viewing or playing.
14. The method of claim 9 further comprising receiving a request for playback of encrypted media content stored on the MCR, the request being made for a second media access control point located remotely from the first media access control point and in communication therewith through a network, the second media access control point including a second SP.
15. The method of claim 14 further comprising locating the first secured content group associated with the requested media content and providing the associated first secured content group to the first SP for decryption and recovery of the final content key for decrypting the requested media content.
16. The method of claim 15 further comprising encrypting the recovered final content key with a second SP public encryption key to create a second secured content key such that the final content key is recovered by decrypting the second secured content key with a second SP private encryption key, the second SP public and private encryption key being associated with the second SP.
17. The method of claim 16 further comprising associating the second secured content key with the metadata to create a second security package having the second secured content key and the metadata.
18. The method of claim 17 further comprising enhancing security of the second security package by signing the second security package to create a second secured content group, the second secured content group associated with the second SP.
19. The method of claim 18 further comprising signing the second security package by hashing the second security package and encrypting the hashed second security package with a second SP private authentication key, the second SP
private authentication key associated with the second SP.
20. The method of claim 19 further comprising transporting the second secured content package to the second SP.
21. The method of claim 20 further comprising decrypting the second secured content package with the second SP private encryption key to recover the final content key.
22. The method of claim 20 further comprising authenticating the second secured content group with a second SP public authentication key to ensure the metadata associated therewith is unaltered, wherein the second SP public authentication key is associated with the second SP private authentication key.
23. The method of claim 20 further comprising issuing an acknowledgment message from the second SP to the first SP to indicate successful recovery of the final content key and authentication of the second secured content group.
24. The method of claim 22 further comprising transporting the requested media content to the second SP for decryption with the final content key recovered by the second SP and output to a media output device.
25. A method for securing transfer, storage, and playback of media content provided to a subscriber of a media content provider, the method comprising:
receiving media content at a first security processor (SP);

encrypting the media content with a first encryption element determined from a random data generator of the first SP;
encrypting the first encryption element with a public encryption element of the first SP whereby the encrypted first encryption element is decrypted with a private encryption element of the first SP to recover the first encryption element; and destroying the first encryption element from the first SP such that the encrypted media content is decrypted by decrypting the encrypted first encryption element with the private encryption key of the first SP.
26. The method of claim 25 further comprising outputting the encrypted first encryption element and the encrypted media content to a media content recorder (MCR) for secure storage such that the stored media content is decrypted for playing on a media output device if the encrypted first encryption element stored therewith is decrypted.
27. The method of claim 26 further comprising outputting the stored media content and the encrypted first encryption element over a network such that a network element having the private encryption key of the first SP
decrypts the encrypted first encryption element with the private encryption key to recover the first encryption element and thereby decrypt the stored media content with the recovered first encryption element.
28. The method of claim 26 further comprising re-encrypting the first encryption element with a second public encryption element of a second SP
such that the re-encrypted first encryption element is decrypted with a private encryption element of the second SP to recover the first encryption element, and outputting the stored media content and the associated re-encrypted first encryption element over a network to the second SP.
29. The method of claim 28 wherein re-encrypting the first encryption element includes the first SP receiving the encrypted first encryption element, the first SP decrypting the encrypted first encryption element with the private encryption element to recover the first encryption element and the first SP
re-encrypting the recovered first encryption element with the second public encryption key of the second SP.
30. A security processor (SP) for securing transfer, storage, and playback of media content, the SP comprising:
a random data generator for creating a randomly generated first encryption element; and wherein the SP is configured to:
encrypt the media content with the randomly generated first encryption element;
encrypt the first encryption element with a public encryption key; and destroy the first encryption element such that decryption of the encrypted first encryption element is performed with a private encryption key in order to recover the first encryption element, and recovery of the first encryption element is from the encrypted first encryption element in order to decrypt the encrypted media content.
31. The SP of claim 30 further configured to present the encrypted first encryption element and encrypted media content to a media content recorder (MCR) for storage.
32. The SP of claim 31 further configured to decrypt the encrypted first encryption element with the private encryption key to recover the first encryption element.
33. The SP of claim 32 further configured to decrypt the encrypted media content with the recovered first encryption element and to output the decrypted media content to a media output device for playback.
34. The SP of claim 32 further comprising a secondary public encryption key for a secondary SP and further configured to decrypt the encrypted first encryption element with the private encryption key to recover the first encryption element and to re-encrypt the recovered first encryption element with the secondary public encryption key, wherein the re-encrypted first encryption element is presented by the SP to the secondary SP to secure transmission of the first encryption element from the SP to the secondary SP.
35. A system for securing transfer, storage, and playback of media content, the system comprising:
a first security processor (SP) configured to:
decrypt media content with a first encryption element;
encrypt the first encryption element;
destroy the first encryption element;
decrypt the encrypted first encryption element to recover the first encryption element; and decrypt the media content with the recovered first encryption element.
36. The system of claim 35 further comprising a media content recorder (MCR) in communication with the first SP for storing the encrypted media content and the encrypted first encryption element.
37. The system of claim 36 further comprising a first media output device in communication with the first SP, wherein the first SP is configured to receive the encrypted media content and encrypted first encryption element from the MCR, to decrypt the received first encryption element to recover the first encryption element, to decrypt the received media content with the recovered first encryption element, and to output the decrypted media content to the media output device for playback.
38. The system of claim 36 further comprising a second SP in communication with the first SP, wherein the first SP is configured to receive the encrypted media content and encrypted first encryption element from the MCR, to decrypt the received first encryption element to recover the first encryption element, to re-encrypt the recovered first encryption element with a public encryption element of the second SP, and to output the re-encrypted first encryption element to the second SP to secure transmission of the first encryption element from the first SP
to the second SP.
39. The system of claim 38 wherein the second SP is configured to decrypt the re-encrypted first encryption element to recover the first encryption element, to decrypt the received media content with the recovered first encryption element, and to output the decrypted media content to the media output device for playback.
CA2590172A 2004-12-08 2005-12-07 Method and system for securing content in media systems Active CA2590172C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/006,864 US8099369B2 (en) 2004-12-08 2004-12-08 Method and system for securing content in media systems
US11/006,864 2004-12-08
PCT/US2005/044078 WO2006062953A2 (en) 2004-12-08 2005-12-07 Method and system for securing content in media systems

Publications (2)

Publication Number Publication Date
CA2590172A1 true CA2590172A1 (en) 2006-06-15
CA2590172C CA2590172C (en) 2013-10-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2590172A Active CA2590172C (en) 2004-12-08 2005-12-07 Method and system for securing content in media systems

Country Status (4)

Country Link
US (1) US8099369B2 (en)
EP (1) EP1820292A4 (en)
CA (1) CA2590172C (en)
WO (1) WO2006062953A2 (en)

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Also Published As

Publication number Publication date
EP1820292A4 (en) 2013-12-25
US20060122946A1 (en) 2006-06-08
US8099369B2 (en) 2012-01-17
EP1820292A2 (en) 2007-08-22
WO2006062953A3 (en) 2007-08-23
WO2006062953A2 (en) 2006-06-15
CA2590172C (en) 2013-10-29

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