Introduction to the special section on electromagnetic information security

This paper introduces the special section on electromagnetic (EM) information security. Topics in this special section include theoretical studies on information propagation via EM fields; acquisition, measurement, and analysis techniques for information leakage from information and communication devices via EM fields; modeling and simulation techniques for the evaluation of EM information leakage; countermeasures against attacks based on EM information leakage; and intentional EM interference (IEMI) and electrostatic discharge threats related to information leakage. This introductory paper describes the background and motivation behind EM information security problems tackled in this special section. In addition, we briefly explain the fundamentals of EM information security: typical mechanisms of information leakage via EM fields, possible countermeasures, and ongoing standardization efforts.