Abstract: Disclosed are a method and an apparatus for digital rights management that can make a host device effectively use rights objects stored in a portable storage device. The method includes requesting a portable storage device to search for a rights object that can execute a specified content object, selecting a rights object to be consumed by confirming information about the rights object received from the portable storage device as a result of the request, and executing the content object by consuming the selected rights object.

Abstract: A method and an apparatus for retrieving a rights object from a portable storage device using an object identifier are provided. The method includes: allowing a host device to have access to a portable storage device; allowing the host device to read an object identifier stored in the portable storage device; allowing the host device to store the read object identifier; and allowing the host device to retrieve the stored object identifier so as to perform a job on an object stored in the portable storage device.

Abstract: A method for searching a portable storage device for a rights object by using an identifier of the rights object, including a host device accessing the portable storage device, retrieving the identifier of the stored rights object from the portable storage device, storing the retrieved object identifier, searching for the stored object identifier to perform an operation associated with the rights object stored in the portable storage device, and acquiring location data of the rights object as a result of the searching.

Abstract: A method and apparatus for effective data management of files are provided. A method for efficient data management of a file includes receiving a request to delete a file, searching for mapping blocks constituting the file in a block map which is constructed with a set of the mapping blocks, the mapping blocks storing therein information about data blocks constituting the file, and adding a linked list to a deletion list, the linked list formed with the mapping blocks obtained as a result of the search.

Abstract: There is provided a method and an apparatus for searching rights objects stored in a portable storage device by using an object location data. The method includes: accessing the portable storage device; transmitting an object identifier to the portable storage device; receiving a location data of a first object searched based on the object identifier from the portable storage device; storing the location data of the first object with the object identifier; and transmitting the location data of the first object and an operation data representing operations to be performed with the first object to the portable storage device by using the location data of the first object.

Abstract: A method and apparatus for managing digital rights of a portable storage device are provided. The method comprises a device performing authentication together with the portable storage device and sharing an encryption key with the portable storage device as a result of the authentication, requesting a rights object list from the portable storage device, receiving the rights object list from the portable storage device, and processing and displaying the rights object list.