代理保护与封闭代理空间模型研究

代理安全是移动代理系统安全中的一个重要问题，而从理论和实践上来看，保护代理的安全目前都是一个难题。从代理的角度来看，代理平台就是计算可信基。只有确保代理的计算可信基，提供一个安全的封闭代理空间，才可能真正保护代理的安全。通过论述代理的安全问题和各种现有保护机制，提出利用封闭的代理空间模型来确保代理的安全是目前的一种可行的手段，分析了模型的安全性。并提出采用尽量少和尽量简单的技术来实现封闭代理空间，减少各种技术间的相关性依赖，为安全的移动代理应用平台提供稳定的安全的环境。

Research of protection of agents and the close agent space model

The security of mobile agent is very important to the security of mobile agents system. It is difficult to protect an agent, from the theory and practice. From agent's aspect, the agents platform is a trustable base for computing. Only the trustable base for MA's computing is available, and a secure close agent space is provided, can it be said that the agents are secured. In this paper, the authors discuss the mobile agents security problems and some present protection mechanism, and advise that the using of Close Agent Space to protect mobile agents should be an possible method currently. The security of the model is also analyzed. The authors also advise that the least and simplest technologies should be used to implement a close agent space, and that the dependency on each methods should be reduced to provide a steady and secure environment for a secure applications based on mobile agents.