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Open Mobile Alliance Secure Content Exchange: Introducing Key Management Constructs and Protocols for Compromise-Resilient Easing of DRM Restrictions

机译：开放移动联盟安全内容交换：引入密钥管理结构和协议以妥协地缓解DRM限制

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摘要

This paper presents an insider's view of the rationale and the cryptographic mechanics of some principal elements of the Open Mobile Alliance (OMA) Secure Content Exchange (SCE) Technical Specifications. A primary goal is to enable implementation of a configurable methodology that quarantines the effects that unknown-compromised entities have on still-compliant entities in the system, while allowing import from upstream protection systems and multi-client reuse of Rights Objects that grant access to plaintext content. This has to be done without breaking compatibility with the underlying legacy OMA DRM v2.0/v2.1 Technical Specifications. It is also required that legacy devices can take at least partial advantage of the new import functionality, and can request the creation of SCE-compatible Rights Objects and utilize Rights Objects created upon request of SCE-conformant devices. This must be done in a way that the roles played by newly defined entities unrecognizable by legacy devices remain hidden.
机译：本文介绍了内部人士对开放移动联盟（OMA）安全内容交换（SCE）技术规范的某些主要元素的原理和加密机制的看法。一个主要目标是实现一种可配置的方法，以隔离未知妥协实体对系统中仍符合法规的实体的影响，同时允许从上游保护系统导入并允许对明文的访问权的多客户端重用内容。必须在不破坏与基础旧版OMA DRM v2.0 / v2.1技术规范兼容性的情况下完成此操作。还要求遗留设备可以至少部分地利用新的导入功能，并且可以请求创建与SCE兼容的权限对象，并利用根据符合SCE的设备的请求创建的权限对象。必须以一种方式隐藏隐藏设备，以使新定义的实体所扮演的角色无法被旧设备识别。

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