Abstract
The unintentional electromagnetic (EM) radiation from electronic information equipment will cause the leakage of information. EM information leakage identification is an important research area of EM information security. Previous studies only focused on a particular type of information leakage, ignoring that there are multiple types of information contained in the leaked EM signal. This paper presents a multi-dimensional information leakage model for the first time, which reveals the multiple information leakage risks in an unintentional EM radiation. The EM information leakage of computer monitors is taken as an example to verify the model. Furthermore, a Convolutional Neural Network (CNN) based multi-dimensional information identification method is proposed. This novel method designed a unified neural network architecture to identify multiple information leaked by the same EM radiation from the monitor. It overcomes the limitation of available identification methods that need to definite leakage characteristics for each type of information leakage. The effectiveness of the method is validated by contrast experiments.
Highlights
Electromagnetic (EM) radiation can be generated in the process of operating an electronic device according to the principle of electromagnetism
We proposed an innovative one-to-many strategy to solve various EM information leakage problems
We took computer monitor as an example to analyze multiple information leakage caused by the same unintentional EM radiation from electronic equipment
Summary
Electromagnetic (EM) radiation can be generated in the process of operating an electronic device according to the principle of electromagnetism. Leaked information recognition is to obtain the information being processed in electronic devices with the EM radiation. The research in this aspect includes: eavesdropping the image information being displayed from computer monitors [6] or connecting wires [12], intercepting the input information typed with keyboards [11], cracking the secret key of the encryption chip [16] and so on. Leakage source information identification is to locate where EM information leakage occurs [17] or identify the electronic device by its EM characteristics [18]. TYPES OF MULTI-DIMENSIONAL INFORMATION FROM EM LEAKAGE The EM signals leaked by electronic equipment contain various information threatening the information security. In order to identify information in different dimensions, we usually adopt different identification methods
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