A research program is being conducted atUppsala University,Sweden, to investigate the possible susceptibility of civilian systems and networks to intentional electromagnetic interference (IEMI), with emphasis on the Swedish railway network.  This paper reviews the details of the research program and some of the results obtained so far.

   The main objective of the research was to generate knowledge on the likely response of civilian facilities and systems when subjected to IEMI. The research contributed to developing a methodology for investigating and protecting sensitive civilian facilities against IEMI and to recommend ways in which protection of civilian systems could be improved.