Method for sharing rights object in digital rights management and device and system thereof

A method for sharing Rights Object (RO) of a Digital Rights Management (DRM) content to simultaneously consume the DRM content between devices and to manage a number of devices which are sharing the RO, the method comprising:

• (a) performing a mutual authentication between a first device and at least one second device to set a session therebetween;
• (b) processing, by the first device, an RO of the first device to temporarily share the RO with the at least one second device and to manage a number of the at least one second device which are sharing the RO of the first device, wherein a maximum number of the at least one second device is determined based on a concurrent element, wherein the processing the RO of the first device further includes creating at least one RO which includes a network connectivity constraint specifying whether a RO is capable of being shared when the at least one second device is in a connected state with a certain network, and wherein the processing the RO further includes creating the at least one RO to include a constraint indicating a minimum number of count to be capable of temporarily sharing the created at least one RO;
• and
• (c) transferring the created at least one RO from the first device to the at least one second device through a particular interface.