Mobile agent technology is a new type of distributed computing technology; with the follow up of cloud computing technology, mobile agent also has the very good application prospect in internet of things. Mobile agent system is the basis of the realization of mobile agent application framework. This paper briefly describes the definition, characteristics and research status of the mobile agent and the mobile agent system. Meanwhile, this paper discusses the security problems of mobile agent,

more »

... according to the different reasons of security problems, we propose different protection mechanism. At last we analyze the development trend of mobile agent.