Design of Robust Security Fonts and Color Composition against Unintended Electromagnetic Emanations from Display Systems

With the advancement of computer and electronic technologies, the importance of cyber-electronic warfare has gradually increased, accentuating the role of information security. Recently, several countries have been actively researching the capture of electromagnetic waves emitted from computer monitors to reconstruct their displays. If confidential data displayed on a screen were to be stolen by attackers, they could potentially pose significant security threats, even at the national level. Therefore, this study explored a means of preventing information leakage via electromagnetic waves, specifically proposing using TEMPEST-resistant fonts and additional TEMPEST-resistant possibilities by utilizing font, text, and background colors in response to security threats.