关键词: 数字版权管理，家庭网络，组密钥技术，RSA算法

Abstract: With the popularization of the consuming electronic products, home networks are prevailing gradually, at the same time the copyright infringement of the digital content in the network is very serious. A digital rights management (DRM) system for protecting the copyrights of digital contents in home networks was proposed. In the proposed system, the home gateway device is responsible for managing the user electronic terminals in the home network and interacting with the external DRM server to enforce DRM functions as their agent. The group key technique adopted by this system makes sure only the legal user terminals can decrypt the encrypted digital content and then consume, and the digital contents can be shared in the home network through the super distribution of the contents between the user ter- urinals.

Key words: Digital rights management, Home network, Group key technique, RSA algorithm