INFORMATION PROCESSING DEVICE AND METHOD, INFORMATION PROVIDING DEVICE AND METHOD, USE RIGHT MANAGEMENT DEVICE AND METHOD, RECORDING MEDIUM, AND PROGRAM

Title:

INFORMATION PROCESSING DEVICE AND METHOD, INFORMATION PROVIDING DEVICE AND METHOD, USE RIGHT MANAGEMENT DEVICE AND METHOD, RECORDING MEDIUM, AND PROGRAM

Document Type and Number:

WIPO Patent Application WO/2003/088563

Kind Code:

A1

Abstract:

Information processing device and method, an information providing device and method, a use right management device and method, a recording medium, and a program capable of preventing an unauthorized use of a content. A root key Kroot is acquired from EKB of a content provided by a content server (3). Moreover, data E (Kroot, Kekb) is decoded by the acquired root key Kroot and an EKB key Kekb is acquired. On the other hand, a use right provided from a license server (4) contains data E (Kpub, Ksub) which is decoded by a private key Kpri and a sub key Ksub is acquired. By the EKB key Kekb and the sub key Ksub, a content key Kc is generated and the content is decoded by the generated content key Kc. The present invention can be applied to a personal computer using a content provided via a network such as the Internet.

Inventors:

ISHIGURO RYUJI (JP)

Application Number:

PCT/JP2003/004545

Publication Date:

October 23, 2003

Filing Date:

April 10, 2003

Export Citation:

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Assignee:

SONY CORP (JP)
ISHIGURO RYUJI (JP)

International Classes:

G06F12/14; G06F21/00; G06F21/10; G06F21/62; G06Q10/00; G06Q30/06; G06Q50/00; G06Q50/10; G11B20/00; H04L9/08; H04L9/32; H04N7/08; H04N7/081; H04N7/167; H04N21/4623; (IPC1-7): H04L9/08

Foreign References:

JP2000048076A

2000-02-18

Other References: