DRM SYSTEM AND METHOD OF MANAGING DRM CONTENT
First Claim
1. A Digital Rights Management (DRM) system, comprising a DRM server for issuing a Public Key Infrastructure (PKI)-based certificate and a key pair to an unconnected device via a network client, connected to the unconnected device so as to allow the unconnected device to share a right to DRM content with the network client and to authenticate the unconnected device and permit the unconnected device to join a domain on a basis of the certificate and the key pair via the network client.
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Accused Products
Abstract
The present invention relate to a DRM system and a method of managing DRM content, which allow the user of content protected by DRM to use DRM content even through an unconnected device, which is not connected to a network. The DRM system includes a DRM server for issuing a Public Key Infrastructure (PKI)-based certificate and a key pair to an unconnected device via a network client connected to the unconnected device so as to allow the unconnected device to share a right to DRM content with the network client and to authenticate the unconnected device and permit the unconnected device to join a domain on a basis of the certificate and the key pair via the network client.
58 Citations
12 Claims
- 1. A Digital Rights Management (DRM) system, comprising a DRM server for issuing a Public Key Infrastructure (PKI)-based certificate and a key pair to an unconnected device via a network client, connected to the unconnected device so as to allow the unconnected device to share a right to DRM content with the network client and to authenticate the unconnected device and permit the unconnected device to join a domain on a basis of the certificate and the key pair via the network client.
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10. A method of managing Digital Rights Management (DRM) content, comprising:
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issuing by a DRM server a Public Key Infrastructure (PKI)-based certificate and a key pair to an unconnected device via a network client after the DRM server is connected to the unconnected device through the network client; and authenticating by the DRM server the unconnected device and joining the unconnected device to a domain, which the network client has joined, on a basis of the certificate and the key pair issued to the unconnected device, via the network client after the DRM server is connected to the unconnected device through the network client. wherein the issuance of the certificate to the unconnected device by the DRM server is performed through a separate sub-certificate issuing server having a trustworthy relationship with a certificate issuing server of the DRM server. - View Dependent Claims (11, 12)
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Specification