The paper describes a system architecture which offers the ability to host mobile agents (so-called Web-agents) on a Web server.This is done by a special server extension module called' server agent environment' (SAE). The agents may access local data of the Web server and may communicate with other Web agents or with human users.The paper discusses the different security issues that srise in such a system and shows how we address the problems.Concerning system and network security,we present a solution based on security packages,protection domains,and agent capabilities.This provides a flexible way to restrict an agent's possibility to access the local server data or access the network.Since we also aim at providing our SAE as a plug-in for other Web servers,we show how this is supported our system architecture.
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