Abstract: A method for importing or moving a rights object (RO) is provided, which includes the following steps. A rights issuer (RI) receives a request message of importing or moving an RO to a target device, the request message including key information encapsulated by a public key of the target device; the RI generates the RO according to the request message, the RO including the key information encapsulated by the public key of the target device; and the RI provides the RO for the target device. An RI is also provided. In the present invention, the key information encapsulated by the public key of the target device is provided for the RI, and the real key is hidden from the RI, such that the un-trust RI cannot generate the illegal RO for other devices except the target device, thereby enhancing the security of importing or moving the RO through the RI.

Abstract: A method for importing or moving a rights object (RO) is provided, which includes the following steps. A rights issuer (RI) receives a request message of importing or moving an RO to a target device, the request message including key information encapsulated by a public key of the target device; the RI generates the RO according to the request message, the RO including the key information encapsulated by the public key of the target device; and the RI provides the RO for the target device. An RI is also provided. In the present invention, the key information encapsulated by the public key of the target device is provided for the RI, and the real key is hidden from the RI, such that the un-trust RI cannot generate the illegal RO for other devices except the target device, thereby enhancing the security of importing or moving the RO through the RI.

Abstract: The present invention discloses a method for transferring licenses, a device for issuing licenses, and a communication system, and relates to the Digital Rights Management (DRM) technology. The method includes: the first issuing device receives a request of transferring a license issued by the second issuing device; the first issuing device transfers the license after determining that a relationship is set up with the second issuing device. The license issuing device includes: a receiving module, a setup module, a determining module, and a sending module. The communication system includes: a first issuing device, a second issuing device, and a device requesting to transfer a license. Through the present invention, an issuing device may transfer the licenses issued by other issuing devices, thus improving the flexibility of transferring the licenses.

Abstract: A method for license interaction and interaction recovery after interruption overcomes the problems of mobility loss and waste of rights of the license due to interruption of communication during the license interaction. This method includes: when a first device and a second device interact on license information, both devices record the interaction related information; after the interaction is interrupted and the connection is re-established, the first device and the second device continue the interaction when determining that the interaction is uncompleted according to the recorded information. A communication device and a digital rights management (DRM) system are also disclosed.

Abstract: A method for exporting permission is provided to solves the problem that the permission can not be exported multiple times among several DRM systems in the prior art; the method includes that: determining that a license is permitted to be exported to a system that a target device belongs to; determining whether an export permission in the license is permitted to be exported; and exporting the export permission in the license to the target device if the export permission in the license is permitted to be exported, which enables the target device to export the license to another device. A terminal apparatus, a server and a communication network are also disclosed.

Abstract: A method for operating a Right For Contents (R4C) includes: obtaining, by a terminal, a hybrid RO generated by the RI server, with the R4C items and the operation Rights For Rights (R4Rs) carried in the hybrid RO; operating the R4C items in the hybrid RO according to the R4R. A method for adding an R4R includes: a terminal receives a hybrid RO that includes the existing rights of the terminal and the newly added R4R; the terminal operates the R4C in the hybrid RO according to the new R4R. The present invention also discloses a terminal and a server. The present invention enables the RI to control the rights at a finer granularity, intensifies the RI's control on the rights, and provides a mechanism of purchasing an R4R after an RO is purchased.

Abstract: A method for backing up and restoring a license is provided, which solves the problem of right proliferation in the prior art caused when an original license is transmitted to a user when a server restores the license. The method includes: backing up, at a server, license information of a first device, and associating the license information with a user identifier, the license information reflecting the current state information of a license when the first device reports the license information the last time; requesting, by a second device, the server to restore the license; and validating, by the server, a user identifier of the second device and the user identifier associated with the license information, and upon determination that the two user identifiers are consistent, generating a license based on the license information backed up, and transmitting the license to the second device. A terminal device, a server, and a license processing system are also provided.