移动代理凭借其移动性和自治性的优点在网络计算中得到了广泛的应用。然而,由于网络的开放性和不可信任性,移动代理面临着严重的攻击威胁,一般可分为两类:一是其它恶意代理对移动代理的攻击;二是恶意的执行主机对代理的攻击。后者的攻击问题更为突显也更难解决。主要表现在:移 Mobile agents are widely used in network computing because of their mobility and autonomy. However, due to the openness and untrustworthiness of the network, mobile agents face a serious threat of attack. Generally, they can be divided into two types: one is the attack by other malicious agents on the mobile agent; the other is the malicious execution by the host on the agent. The latter issue of attack is more prominent and more difficult to solve. Mainly in: move