首先是移动代理系统的安全问题，特别是恶意主机问题；其次是电子商务中的公平交易问题。
First is the security of mobile agent system, especially the malicious host problem; Second is the fair exchange problem in electronic commerce.
根据《电子工程专辑》美国版一月刊的机密报告显示，苹果公司是2011年在移动设备上提供安全的交易服务最受期待的厂商之一。
The company is one of several expected to deliver secure transaction services on mobile devices in 2011, according to a report in the January issue of EE Times Confidential.
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