In the area of mobile computing extensive research has been made for defining and constructing the concepts and forms of Mobile lnformation Systems to support the evayday tasks of executives and experts when they are travelling. The main functional areas of Mobile lnformation Systems are information, communication. analysis and decision making, and office work support - all overlaying a mobile environment. This paper focuses on analysis and decision making tools, security and anonymity issues and on communication architecture in Mobile Information Systems. We will suggest methods for combining data views to perform analysis, for coordinating decision making, as well as problem solving and group decision making, as well as for problem solving and group decision making. The security and anonymity or the Executives' Mobile Personal Information System (EMPIS) are studied from the viewpoints of the concept of an EMPIS travelling alias. GSM limitation, time-based aliasing, and shared key encryption. The EMPIS communication architecture is analysed from such viewpoint, as routing challenges in an ad hoc mobile environrnent, the relevance of bandwidth to EMPIS communication. and data transfer by asynchronous transfer mode.
mobile information system, executive information system, mobile computing, analisys, decision making, office work.
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