中文摘要：

随着信息与通信技术的飞速发展，数字媒体内容的分发、复制与编辑变得越来越普遍．数字内容的版权管理和内容保护可以减少内容盗版和不规范使用行为．本文介绍了数字版权管理技术的基本原理，综述了关键技术，分析了国内外应用情况，并讨论了几个具有挑战性的问题．最后，总结了全文，并展望了该技术领域的研究重点和发展方向．

英文摘要：

With the rapid development of ICT technologies,the distribution,copying,and editing the digital media content is more and more easy. The copyright management and content protection of digital content may decrease the content piracy and abnormal usage. In this paper, the basic principal of DRM （digital rights management ） is introduced firstly. The key technologies of DRM are summarized in detail secondly. The DRM applications of main scenarios are analyzed thirdly. In addition, several challengeable problems are discussed. Finally, the key research interest and development tendency are expected.