首页> 外文会议>International Symposium on Computer and Information Sciences(ISCIS 2005); 20051026-28; Istanbul(TR) >Group-Oriented Channel Protection for Mobile Devices in Digital Multimedia Broadcasting
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Group-Oriented Channel Protection for Mobile Devices in Digital Multimedia Broadcasting

机译:数字多媒体广播中移动设备的面向组的频道保护

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In 2004, Huang et al. proposed a new key distribution scheme for media delivery in Pay-TV Systems based on a four-level key hierarchy. A three-key distribution scheme is proposed in Huang et al.'s paper. They use an exclusive-OR operation and a one-way hash function for key distribution in order to reduce the computational cost. One of the key distribution schemes for subscription channel protection, the group oriented key distribution scheme, however, is inefficient for the digital multimedia broadcasting (DMB) service in resource-limited mobile phones. In this paper, we show that Huang et al.'s scheme is inefficient regarding subscription channel protection. As a result, we propose an improved scheme to reduce this inefficiency by applying a two-level key hierarchy method for a resource limited device, such as the DMB service in mobile phones.
机译:2004年,Huang等。提出了一种基于四级密钥层次结构的,用于付费电视系统中媒体交付的新密钥分发方案。 Huang等人的论文提出了一种三键分配方案。他们使用异或运算和单向哈希函数进行密钥分配,以减少计算成本。然而,用于订阅信道保护的密钥分发方案之一,面向组的密钥分发方案对于资源受限的移动电话中的数字多媒体广播(DMB)服务效率低下。在本文中,我们表明Huang等人的方案在订阅信道保护方面效率低下。结果,我们提出了一种改进的方案,通过对资源受限的设备(例如手机中的DMB服务)应用两级密钥层次方法来减少这种低效率。

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