Method and device for rights management

A first device far digital rights management of digital data content, the first device connected to at least one second device via a communication channel and comprising a digital right for accessing said digital data content and available amount of access to said digital data content, said first device comprising:

• a receiving unit for receiving a request from the second device for a portion of the amount of access to the digital data content;
• a comparing unit for comparing the requested portion of the amount of access with said available amount of access;
• a selecting unit for when the requested portion of the amount of access is within said available amount of access, deducting said requested portion of the amount of access from said available amount of access;
• a transferring unit for transferring said requested amount of access to said second device via the communication channel;
• a duplicating unit for duplicating said digital right for accessing said digital data content to said second device as a second digital right;
• a first verifying unit for verifying, by said second device, that said second digital right and an amount of access used by the second device are not modified without authorization;
• a returning unit for returning from said second device at least a part of said requested amount of access that is unused by said second device based upon results of the first verification unit;
• a receiving unit for receiving back from the returning unit of said device at least part of said requested amount of access that is unused by said second device;
• a second verification unit for verifying that said right and said available amount of access are not modified without authorization;
• and
• a merging unit for merging the part of said requested amount of access that unused by the second device with said available amount of access based upon results of the verification by the second verification unit.