Abstract: A method and apparatus for creating a unique identifier (ID) is provided. The apparatus includes a searcher that searches the device for a device description document, a reader that reads a universally unique identifier (UUID) of the device, and a creator that creates a unique ID of the device using the read UUID.

Abstract: A method and apparatus are provided for temporarily accessing content using a temporary license. The method includes creating an authenticated license that enables a use of the content, creating a temporary license that enables a use of part of the content, and transmitting the authenticated license and the temporary license to a device.

Abstract: Provided is a method and apparatus for configuring keys of groups contained in a domain. The method includes generating a common key and N distribution keys according to the number (N) of users who join a domain, transmitting the common key to users' devices, and transmitting N?1 distribution keys of N different distributions keys to the users' devices, wherein a set of the N?1 distribution keys received by the user's device is different from a set of the N?1 distribution keys received by devices of other users who join the domain.

Abstract: A system for providing a digital rights management (DRM) license includes a sink system requesting a license for content, a source system generating and providing a plurality of sub-rights tokens, which include binding information having path information that indicates relations among a plurality of principals, in accordance with the request, and a rights mediator generating a main rights token by combining the plurality of sub-rights tokens and transmitting the generated main rights token to the system. The sink system determines whether to access the license which is bound to the principals on the basis of the main rights token.

Abstract: A system and method for providing a digital rights management (DRM) license are provided. The system includes a sink system which requests a license for content; a source system which generates and provides a first rights token including binding information related to the license, in accordance with the request; and a rights mediator which generates a second rights token on the basis of the first rights token, and transmits the generated second rights token to the sink system; wherein the sink system provides the license for the content on the basis of the second rights token. The method includes receiving a request for a license for content; generating a first rights token including binding information related to the license, in accordance with the request; generating a second rights token; and providing the license for the content on the basis of the generated second rights token.

Abstract: A system for providing digital rights management (DRM) license is provided. The system includes a sink system requesting a license for content, a source system generating and providing a first rights token including binding information related to the license, in accordance with the request, and a rights mediator generating a second rights token that is usable in the sink system on the basis of the first rights token and transmitting the generated second rights token to the sink system. The sink system provides the license for the content on the basis of the second rights token. The first rights token includes binding information of principals that indicates use subjects related to the license, and binding information of principals that indicates use objects related to the license.

Abstract: A method and apparatus for electronic commerce using a digital ticket are provided. The method for electronic commerce using a digital ticket includes hiding a message comprising a random number and transmitting the hidden message to a ticket issuer, receiving the hidden message signed with a digital signature by the ticket issuer, verifying the digital signature on the message, and transmitting the message with the verified digital signature to the ticket issuer to consume a digital ticket.