Title:
ENCRYPTED MEDIA KEY MANAGEMENT
Document Type and Number:
Japanese Patent JP2008252956
Kind Code:
A
Abstract:
To provide a key or license management system for the secure online distribution of digitized audio-visual works (media), using encryption techniques.
In a key management system, encrypted media is stored on a media server 8, while the encryption keys are stored on a media key server 3. Users acquire rights from online retailers 11 to obtain from the media key server 8 keys corresponding to the media they wish to play. The key server 8 encrypts keys before releasing them, preferably, with the user's public key 4 using a public key encryption algorithm. Media keys are stored in a volatile memory at the user's client device, and thus the user is in receipt of the key just in time to play the media.
Inventors:
RAIKE WILLIAM MICHAEL
DONOVAN-SMITH BRIAN JAMES
HIGGINS SEAN JOSEPH
MARTIN PATRICK JOHN
DONOVAN-SMITH BRIAN JAMES
HIGGINS SEAN JOSEPH
MARTIN PATRICK JOHN
Application Number:
JP2008187229A
Publication Date:
October 16, 2008
Filing Date:
July 18, 2008
Export Citation:
Assignee:
RPK NEW ZEALAND LTD
International Classes:
H04L9/08; G06F21/00; G06Q30/00; G06Q50/00; H04L29/06; H04N7/167; H04N7/24; H04N21/254; H04N21/6334; H04N21/6377; H04N21/835; H04L9/30
Domestic Patent References:
| JPH11126020A | 1999-05-11 | |||
| JP2000183867A | 2000-06-30 | |||
| JPH11328214A | 1999-11-30 | |||
| JPH09114787A | 1997-05-02 | |||
| JP2000330873A | 2000-11-30 | |||
| JPH1040100A | 1998-02-13 |
Foreign References:
| US5864620A | 1999-01-26 | |||
| WO2000008909A2 | 2000-02-24 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Kuniaki Shimizu
Hayashi Zouzo
Hajime Asamura
Kuniaki Shimizu
Hayashi Zouzo