WO2000058963B1 - Copy security for portable music players - Google Patents

Copy security for portable music players

Info

Publication number
WO2000058963B1
WO2000058963B1 PCT/US2000/008118 US0008118W WO0058963B1 WO 2000058963 B1 WO2000058963 B1 WO 2000058963B1 US 0008118 W US0008118 W US 0008118W WO 0058963 B1 WO0058963 B1 WO 0058963B1
Authority
WO
WIPO (PCT)
Prior art keywords
data
key
access device
storage medium
encrypted
Prior art date
Application number
PCT/US2000/008118
Other languages
French (fr)
Other versions
WO2000058963A3 (en
WO2000058963A2 (en
Inventor
Steven T Ansell
Andrew R Cherenson
Mark E Paley
Steven B Katz
John Michael Kelsey Jr
Bruce Schneier
Original Assignee
Liquid Audio Inc
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 Liquid Audio Inc filed Critical Liquid Audio Inc
Priority to AT00918450T priority Critical patent/ATE466365T1/en
Priority to EP00918450A priority patent/EP1166265B1/en
Priority to AU39256/00A priority patent/AU3925600A/en
Priority to JP2000608380A priority patent/JP4986327B2/en
Priority to DE60044292T priority patent/DE60044292D1/en
Publication of WO2000058963A2 publication Critical patent/WO2000058963A2/en
Publication of WO2000058963A3 publication Critical patent/WO2000058963A3/en
Publication of WO2000058963B1 publication Critical patent/WO2000058963B1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00115—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers wherein the record carrier stores a unique medium identifier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00188—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00188—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
    • G11B20/00195—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00333—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in header data, e.g. in sector headers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
    • G11B20/00782—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of times a program can be installed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
    • G11B20/00797—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of times a content can be reproduced, e.g. using playback counters
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/0084—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific time or date
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Abstract

Data such as a musical track is stored as a secure portable track (SPT) which can be bound to one or more players and can be bound to a particular storage medium, restricting playback of the SPT to the specific players and ensuring that playback is only from the original storage medium. The SPT is bound to a player by encrypting data of the SPT using a storage key which is unique to the player, is difficult to change, and is held in strict secrecy by the player. The SPT is bound to a particular storage medium by including data uniquely identifying the storage medium in a tamper-resistant form, e.g., cryptographically signed. The SPT can also be bound to the storage medium by embedding cryptographic logic circuitry, e.g., integrate circuitry, in the packaging of the storage medium. The SPT is bound by encrypting an encryption key using the embedded logic. By using unique cryptographic logic, only that particular storage medium can decrypt the encryption key and, therefore, the data of the SPT encrypted with the encryption key. To allow a user to playback the SPT on a number of players, players can share storage keys with one another. Such key sharing is done in a cryptographically secure manner. Before downloading an SPT to a particular external player, the ability of the external player to enforce restrictions placed upon the SPT is verified.

Claims

- 26 - AMENDED CLAIMS [received by the International Bureau on 14 December 2000 (14.12.00); original claims 1, 10, 21, 24-27 and 33 amended; new claim 34 added; remaining claims unchanged (6 pages)]
1. A method for binding subject data to a selected data access device such that the subiect data is inaccessible to data access devices other than the selected data access device, the method comprising: encrypting the subject data to form encrypted subject data using data corresponding to the selected data access device as an encryption key; forming key identification data from the encryption key; and storing the encrypted subject data and the key identification data in a storage medium which is readable by the selected data access device; wherein the encryption key is not directly determinable from data stored on the storage medium including the key identification data and the encrypted subject data.
2. The method of Claim 1 wherein encrypting the subject data comprises: encrypting the subject data using a master key; and encrypting the master key with the encryption key to form an encrypted master key.
3. The method of Claim 2 wherein storing the encrypted subject data and the key identification data further comprises: storing the encrypted master key in the storage medium.
4. The method of Claim 3 further comprising: forming message verification data using the key identification data and the encrypted master key; and storing the message verification data in the storage medium.
5. The method of Claim 4 wherein the message verification data is a message authentication code (MAC). - 27 -
6. The method of Claim 1 further comprising: forming message verification data using the key identification data; and storing the message verification data in the storage medium.
7. The method of Claim 6 wherein the message verification data is a message authentication code (MAC).
8. The method of Claim 1 wherein the subject data includes digitized audio signals.
9. The method of Claim 1 wherein the data secretly held by the selected data access device is read-only.
10. A method for accessing subject data from a storage medium by a selected data access device, the method comprising: retrieving key identification data from the storage medium; determining that the key identification data corresponds to data secretly held by the selected data access device; retrieving encrypted subject data from the storage medium; and decrypting the encrypted subject data using the data secretly held by the selected data access device as an encryption key to form the subject data; wherein the key identification data is formed from the encryption key; and wherein the encryption key is not directly determinable from data stored on the storage medium including the key identification data and the encrypted subject data.
11. The method of Claim 10 wherein the storage medium is a removable storage medium.
12. The method of Claim 10 wherein decrypting comprises: retrieving an encrypted master key from the storage medium; decrypting the encrypted master key using the data secretly held by the - -
selected data access device as an encryption key to form a master key; and decrypting the encrypted subject data using the master key to form the subject data.
13. The method of Claim 10 further comprises: retrieving message verification data from the storage medium; and verifying authenticity of the key identification data using the message verification data.
14. The method of Claim 13 wherein the message verification data is a message authentication code (MAC).
15. The method of Claim 10 wherein the subject data includes digitized audio signals.
16. The method of Claim 15 further comprising: playing back the digitized audio signals.
17. The method of Claim 10 wherein the subject data includes digitized video signals.
18. The method of Claim 17 further comprising: rendering the digitized video signals.
1 . The method of Claim 10 wherein the subject data includes computer code.
20. The method of Claim 1 5 further comprising: executing the computer code.
21. A method for accessing subject data from a storage medium by a selected data access device, the method comprising: receiving key data corresponding to a second data access device from the - -
second data access device; retrieving key identification data from the storage medium; determining that the key identification data corresponds to the key data received from the second data access device; retrieving encrypted subject data from the storage medium; and decrypting the encrypted subject data using the key data received from the second data access device as an encryption key to form the subject data.
22. The method of Claim 21 wherein the storage medium is a removable storage medium.
23. The method of Claim 21 wherein decrypting comprises: retrieving an encrypted master key from the storage medium; decrypting the encrypted master key using the data secretly held by the selected data access device as an encryption key to form a master key; and decrypting the encrypted subject data using the master key to form the subject data.
24. The method of Claim 21 wherein receiving key data corresponding to a second data access device comprises: sending a request message to the second data access device requesting key data from the second data access device; receiving a reply message from the second data access device which includes encrypted key data; decrypting the encrypted key data to form the key data.
25. The method of Claim 24 wherein receiving key data corresponding to a second data access device further comprises: sending an exchange message to the second data access device where the exchange message includes encrypted key data corresponding to the selected data access device. - -
26. The method of Claim 24 wherein receiving key data corresponding to a second data access device further comprises: receiving a terminate message from the second data access device.
27. The method of Claim 24 wherein receiving key data corresponding to a second data access device further comprises: preventing storage of the key data within the selected data access device upon a condition in which equivalent key data is already stored within the selected data access device.
28. The method of Claim 24 wherein the request message includes a pseudorandom number.
29. The method of Claim 28 wherein the reply message include the first- mentioned pseudo-random number and a second pseudo-random number.
30. The method of Claim 24 wherein the request message includes a certificate of the selected data access device.
31 The method of Claim 24 wherein the request message conveys a public key of the selected data access device to the second data access device.
32. The method of Claim 31 wherein decrypting the encrypted key data comprises: decrypting the encrypted key data using the private key of the selected data access device to form the key data.
33. The method of Claim 21 wherein receiving key data corresponding to a second data access device comprises: receiving a request message from the second data access device requesting key data from the selected data access device; sending si reply message to the second data access device which includes - 31 -
encrypted key data; receiving an exchange message from the second data access device which includes other encrypted key data; and decrypting the other encrypted key data to form the key data. Add new Claim 34 as follows:
34. The method of Claim 21 wherein the encryption key is not directly determinable from data stored on the storage medium including the key identification data and the encrypted subject data.
- -
STATEMENT UNDER ARTICLE 19 fl .
Amended Claims 1 and 10 and new Claim 34 recite that "the encryption key is not directly determinable from data stored on the storage medium including the key identification data and the encrypted subject data." This is supported at least by the Specification at page 10, line 28. to page 11, line 1, which teaches: "Storage key identification field 406 (Figure 4) stores a digest of the storage key to identify the storage key without recording the storage key itself within SPT 1 160
No new matter is added.
PCT/US2000/008118 1999-03-26 2000-03-24 Copy security for portable music players WO2000058963A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT00918450T ATE466365T1 (en) 1999-03-26 2000-03-24 COPY PROTECTION FOR PORTABLE MUSIC PLAYERS
EP00918450A EP1166265B1 (en) 1999-03-26 2000-03-24 Copy security for portable music players
AU39256/00A AU3925600A (en) 1999-03-26 2000-03-24 Copy security for portable music players
JP2000608380A JP4986327B2 (en) 1999-03-26 2000-03-24 Copy security for portable music players
DE60044292T DE60044292D1 (en) 1999-03-26 2000-03-24 COPY PROTECTION FOR PORTABLE MUSIC PLAYING DEVICES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/277,439 1999-03-26
US09/277,439 US6367019B1 (en) 1999-03-26 1999-03-26 Copy security for portable music players

Publications (3)

Publication Number Publication Date
WO2000058963A2 WO2000058963A2 (en) 2000-10-05
WO2000058963A3 WO2000058963A3 (en) 2001-01-04
WO2000058963B1 true WO2000058963B1 (en) 2001-03-01

Family

ID=23060868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/008118 WO2000058963A2 (en) 1999-03-26 2000-03-24 Copy security for portable music players

Country Status (7)

Country Link
US (1) US6367019B1 (en)
EP (1) EP1166265B1 (en)
JP (1) JP4986327B2 (en)
AT (1) ATE466365T1 (en)
AU (1) AU3925600A (en)
DE (1) DE60044292D1 (en)
WO (1) WO2000058963A2 (en)

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