Design a high-impact thumbnail image for a video discussing the security concerns of electronic voting machines. feature a digital representation of an electronic voting machine with a visible padlock icon and a question mark overlay to symbolize the central theme of security vulnerabilities. employ a color scheme that conveys urgency or caution, such as reds or oranges, and ensure the text 'insecurities of electronic voting machines?' is prominently displayed. the design should be clear and compelling to encourage viewership, while maintaining an informative and non-sensational tone.