摘要:
In a system for distributing and licensing rights-managed digital content, the way in which content is distributed and licensed can be affected by the trust relationships that are established between the various servers that participate in the system. In a typical system, a license server licenses content to particular identities, and an identity server defines those identities by issuing certificates for those identities. The license server issues licenses to identities that have been issued by trusted identity servers. Also, the license server can issue a license on behalf of any entity whose private key it holds. Thus, in one embodiment, the universe of people to whom the license server can issue licenses can be expanded by adding new identity servers to the list of trusted identity servers. In another embodiment, exceptions to the general trust of an identity server can be carved out by creating an exclusion list, which excludes particular identity certificate (e.g., on the basis of e-mail address, domain name, etc.) that have been issued by a trusted identity server. In another embodiment, the universe of content for which the license server can issue licenses can be expanded by providing the license server with the private keys of other license servers.
摘要:
Systems and methods for managing access to a piece of content in a peer-to-peer computing system are disclosed. A client device comprises a user interface (1000; 1210) for receiving a request from a user to access a piece of protected content, a host application (1002; 1200) for recognising a protected content object format and issuing a request to a digital rights management engine (1220) to evaluate digital rights management objects that make up a licence, and a digital rights management engine (1000; 1220) for executing the control program (1324) to determine whether permission to access the protected content should be granted. The licence comprises a set of objects that protect the content and govern its use, including a control object (1320), the control object including a control program (1324). Executing the control program comprises determining whether there exists a set of link objects (1420) representing relationships between nodes that can establish a path to a target node.
摘要:
Systems and methods for managing access to a piece of content in a peer-to-peer computing system are disclosed. A client device comprises a user interface (1000; 1210) for receiving a request from a user to access a piece of protected content, a host application (1002; 1200) for recognising a protected content object format and issuing a request to a digital rights management engine (1220) to evaluate digital rights management objects that make up a licence, and a digital rights management engine (1000; 1220) for executing the control program (1324) to determine whether permission to access the protected content should be granted. The licence comprises a set of objects that protect the content and govern its use, including a control object (1320), the control object including a control program (1324). Executing the control program comprises determining whether there exists a set of link objects (1420) representing relationships between nodes that can establish a path to a target node.
摘要:
A personal computer PC (10) transmits encrypted user information and encrypted license information in a secure recording medium (MA) to a server (20). The server decrypts the encrypted license information and obtains the license information. After this, the server erases the encrypted license information in the secure recording medium (MA) via the personal computer PC. The server decrypts the encrypted user information in the secure recording medium (MB) and obtains the user information. After this, according to the user information, the server encrypts the license information and writes the encrypted license information obtained into the secure recording medium (MB) via the personal computer PC. Thus, it is possible to move the license information between the two secure media, thereby improving the convenience.
摘要:
A system and method for trading licenses that convey rights to digital works. An offer to sell a license is received from a first party, and a bid to buy the license is received from a second party. If the bid meets the requirements of the offer, then a transaction is effectuated wherein the second party acquires the rights signified by the license.
摘要:
Method and system for securely sharing content in real-time systems over heterogeneous networks. Cryptographic mechanisms of the content are used to protect the confidentiality and the integrity of the content. The confidentiality/integrity protection may be performed either before storing the content on the content server (i.e., pre-encryption), or by the content server while the content is being sent (i.e., real-time encryption).
摘要:
A license consignment method and system for a portable device playing a right-protected content with a license is provided for improving utilization reliability and manageability of a license by enabling a license server to manage the license consigned by the portable device. The method includes selecting a license to be consigned to a license server, transmitting the license server license information corresponding to the selected license, and transmitting, when the license is not downloaded in a certain time, a download trigger message to the portable device.
摘要:
A license consignment method and system for a portable device playing a right-protected content with a license is provided for improving utilization reliability and manageability of a license by enabling a license server to manage the license consigned by the portable device. The method includes selecting a license to be consigned to a license server, transmitting the license server license information corresponding to the selected license, and transmitting, when the license is not downloaded in a certain time, a download trigger message to the portable device.
摘要:
A controller (900) for transferring media content rights between media devices comprising a memory (906), a user interface (910) and a transceiver (902). The memory (906) stores a list of media devices (914) capable of receiving the permissions associated with the media content from an originating device and an encryption key (920) that may be used to encrypt the permissions. The user interface (910) detects a user selection of a target device from the list of media devices (914). The transceiver (902) communicates an address (916) associated with the target device and the encryption key (920) to the originating device. Thus, the originating device is able to encrypt the permissions using the encryption key (920) and send the encrypted permissions to the address (916) associated with the target device.