Title:
コンテンツ保護システムなどにおける高信頼ライセンス削除
Document Type and Number:
Japanese Patent JP2007534078
Kind Code:
A
Abstract:
A digital license includes an identification of a removal service that can authorize removing such license. A client selects the license to be removed and the service, constructs a challenge including therein a challenge license identification block (LIB) identifying the license to be removed, and sends the challenge to the service. The service receives the challenge, stores at least a portion of the challenge in a database, constructs a response corresponding to the challenge and including therein a response LIB identifying the license to be removed and an identification of the service, and sends the response to the client.; The client receives the response, employs the response LIB from the response to identify the license to be removed, and removes the identified license upon confirming that the identification of the service in the identified license matches the identification of the service in the response.
Inventors:
Benjamin brooks cutter
Brian P. Evans
Clifford P. Strom
Bicas Kanderwal
Brian P. Evans
Clifford P. Strom
Bicas Kanderwal
Application Number:
JP2007509446A
Publication Date:
November 22, 2007
Filing Date:
July 29, 2004
Export Citation:
Assignee:
MICROSOFT CORPORATION
International Classes:
G06F21/00; G06F11/30; G06F12/14; G06F17/00; G06F19/00; G06F21/22; G06F21/24; H04K1/00; H04L9/00; H04L9/32
Domestic Patent References:
| JP2003242038A | 2003-08-29 | |||
| JP2002269375A | 2002-09-20 | |||
| JP2003536119A | 2003-12-02 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe