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In 2007, Kim et al. proposed a secure compression code called the secure arithmetic code (SAC). The code was claimed to be secure against chosen plaintext attacks. However, we find that the SAC is not as secure as the authors have claimed. In this paper, we show the code is prone to two attacks. The first attack completely breaks the code using an adaptive chosen plaintext attack with a polynomial...
With the rapid development of wireless communication, mobile users are able to manually switch their network interfaces to different types of networks. The IEEE 802.21 Draft Standard was proposed to integrate the Media Independent Handover (MIHs) between the wireless network interfaces, such as WiFi, WiMAX, 3 GPP, and 3GPP2. However, it may not hold the seamless roaming character and does not provide...
Mobile WiMAX (IEEE 802.16e) is an emerging technology for wireless broadband access network. It provides wider converge and higher bandwidth than conventional wireless technologies. Multicast and Broadcast (M&B) in WiMAX are suitable for multimedia applications such as Pay-TV system because multimedia providers can efficiently distribute the same contents to the users within the same M&B group...
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