So how to protect the right and obligation of the parties in trade is the main issue that people care and study, and the key to solve this problem is Digital Rights Management.

• 所以,如何保证数字内容市场中交易各方的权利与义务就成为人们目前关心和研究的主要问题,而解决这一问题的关键就是数字权限管理技术。