【摘要】 电子文档版权管理是数字版权管理的重要研究领域,提出一种PDF电子文档版权保护方案,该方案的权限管理基于一种具有强大表达力、灵活性和开放权限管理能力的动态逻辑许可证,具有详细的文档权限控制方法,并通过内容级的PDF文档加密方法增强文档的安全性。对系统模型、实现结构和方法进行说明,并与相关方法进行对比和应用示例。更多还原

【Abstract】 Digital Rights Management(DRM) of digital documents is one of the important research fields of DRM.This paper presents a digital rights management scheme of PDF digital documents,whose rights management is based on a kind of dynamic logical license which owns a detailed control methods of document rights and an enhanced security by content grade encryption.The system model,implementation architecture and method are explained.A comparative analysis is showed and an application example is analyzed.更多还原