AbstractIP multimedia subsystem (IMS) is becoming the prevailing candidate for managing future mobile multimedia communications, including critical communications such as public safety, emergency professionals and corporate networks. IMS security and privacy has gained much attention in the few last years. The review of recent IMS security activities stresses the inclusion of intermediate nodes in the media path of secured communications as an open issue. This paper presents an end-to-middle-to-end solution which enables the usage of IMS media plane elements such as recorders, transcoders and novel cross-ciphering functions in a secure way. The proposed solution, which is fully compliant with IMS, includes the network architecture, the signaling plane for session signaling and key management, and the media-plane security characteristics. Experimental results demonstrate that the proposed solution can provide media interoperability (both transcoding and cross-ciphering) with a cost of 17 % overhead to a standard IMS call setup in the signaling plane.

中文翻译：

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IMS媒体平面安全性的端到端到端解决方案

AbstractIP多媒体子系统（IMS）正在成为管理未来移动多媒体通信（包括诸如公共安全，应急专业人员和公司网络等关键通信）的主要候选者。近年来，IMS的安全性和隐私得到了广泛的关注。对最近IMS安全活动的审查强调，将中间节​​点包含在安全通信的媒体路径中是一个未解决的问题。本文提出了一种端到中间到端的解决方案，该解决方案可以安全地使用IMS媒体平面元素，例如记录器，代码转换器和新颖的交叉加密功能。所提出的解决方案完全符合IMS，包括网络体系结构，用于会话信令和密钥管理的信令平面以及媒体平面安全特性。