Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:21P1
Session:
Number:21P1-3
Countermeasure Technique for Preventing Information Leakage Caused by Unintentional PC Display Emanations
Y. Suzuki, M. Masugi, H. Yamane, K. Tajima,
pp.9-12
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
A working personal computer (PC) and/or a PC display monitor usually produce unintentional electromagnetic fields. It has been known that the information from a video display unit could be reconstructed by intercepting such emissions at a distance. Proper measures are needed to prevent information leakage against such eavesdropping, which are often collectively called ″TEMPEST″. We have studied a countermeasure technique for such a problem and proposed jamming schemes for industrial and home use. We also developed a prototype for protecting devices and evaluated its performance in preventing such emanation eavesdropping.