DRM细粒度使用控制模型及其安全机制

摘要

In order to solve the question on usage control models available do not support, flexible and secure usages on finegrained digital contents in digital rights management, A formal fine-grained usage control theoretical model and its prototype security architecture and realization mechanisms are proposed based on the extension of generic usage control UCON/Abc. The scheme minimizes the granularity of digital assets into some basic units with completed semantics, by using a method for the content entity segment, and then enables security control based on the authorized license. The use case of electronic-book application denotes that the proposed model effectively improves security and flexibility of usage control on the user terminal rendering of digital contents.%为了解决现有数字版权管理中使用控制模型缺乏对细粒度数字内容的灵活和安全使用的问题,基于对一般使用控制模型UCONABC的扩展,提出了形式化的细粒度使用控制理论模型Gran-UCON及其原型系统安全框架和实现机制.该方案将数字资源实体进行细粒度分割,使其粒度减小到具有完整意义的基本单元,进一步通过许可授权加以安全控制.应用实例验证了该模型在数字内容用户终端使用中的安全性和灵活性.