基于断点恢复技术的DRM打包器

摘要

Aiming at the problem that so many researches in packager in DRM system just limited to functional discussion and technical summary now, a general DRM packager based on breakpoints recovery technology is presented. By real-time recording the status information of packager with breakpoints sets, the packager will restore the former packaging tasks when it is restarted after exception interrupted. And by using adaptive encryption scheme, the packager takes different encryption strategies automatically according to the file size. Therefore the efficiency ofencryption is improved in the premise of ensuring safety. The tests show, compared to the popular commercial DRM packager, the packager is more efficient and more robust, and it offers a referenced solution for similar projects.%针对目前数字版权管理(DRM)系统中关于打包器的研究只限于功能论述和技术概括的现象,提出了一种基于断点恢复技术的通用DRM打包器.打包器通过断点集实时记录其状态信息,在发生异常中断重新启动时自动恢复中断前的打包任务.并采用自适应加密方案对不同大小的文件自动采取不同的加密策略,在保证安全性的前提下提高了加密效率.与普遍采用的商用DRM打包器的对比测试结果表明,该打包器具有更高的效率和健壮性,可为同类项目开发提供参考的解决方案.