EMCEM: An Efficient Multimedia Content Encryption Scheme for Mobile Handheld Devices
EMCEM: An Efficient Multimedia Content Encryption Scheme for Mobile Handheld Devices
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DOI：
10.1109/iciss.2008.13
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发表时间：
2008-01
期刊：
影响因子：
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通讯作者：
J. Han;Hyeyoung Chang;Seong-je Cho;Minkyu Park
中科院分区：
文献类型：
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作者：
J. Han;Hyeyoung Chang;Seong-je Cho;Minkyu Park
由于许多人消费多媒体内容(音乐、电影等)在移动设备上，移动DRM变得越来越重要，它控制着无线环境下的数字内容使用。在典型的DRM模型中，由于分组密码具有合理的安全性和性能，通常使用分组密码来加密多媒体内容。然而，在移动环境中使用分组密码加密多媒体内容，由于其庞大的体积，需要大量的计算能力和能量。这是一个关键问题，因为用户希望通过随机访问获得较长的播放时间和快速响应。本文提出了一种适用于移动手持设备的高效多媒体内容加密方案(EMCEM)，该方案使用分组密码加密部分内容，使用流密码加密部分内容。我们还使用了不同的流密钥来提高安全性。EMCEM支持当前的DRM体系结构，支持对媒体文件的随机访问，并且可以灵活地轻松确定性能和安全性之间的权衡。实验结果表明，与完全使用分组密码加密内容相比，EMCEM具有更好的性能。
Since many people consume multimedia content (music, movie etc.) on mobile devices, mobile DRM becomes important, which controls digital content usage under wireless environment. In a typical DRM model, a block cipher is usually used to encrypt multimedia content because of its reasonable security and performance. However, encrypting multimedia content using a block cipher in mobile environment requires much computation power and energy due to its huge size. It is critical problems because users want long playtime and quick responsiveness with random access. In this paper, we propose an efficient multimedia content encryption scheme for mobile handheld devices (EMCEM), which uses a block cipher to encrypt some parts of content and a stream cipher to encrypt the others. We also use different stream cipher key to improve security. EMCEM accommodates the current DRM architecture, supports random access to a media file, and has flexibility to determine easily the trade-off between performance and security. Experimental results have shown that EMCEM has much better performance than encrypting content completely using a block cipher.