Open AccessMethod for detecting text information leakage in electromagnetic radiation from a computer display
Author(s) -
Sun DeGang,
Shi Jun,
Wei Dong,
Zhang Meng,
Huang WeiQing
Publication year - 2016
Publication title -
iet information security
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.308
H-Index - 34
eISSN - 1751-8717
pISSN - 1751-8709
DOI - 10.1049/iet-ifs.2014.0529
Subject(s) - information leakage , leakage (economics) , computer science , radiation , physics , optics , computer security , economics , macroeconomics
Considering that the text information might be leaked through electromagnetic radiation from a computer display, a novel algorithm has been developed to detect the text information leakage. Motivated by the observation that the ‘text ‐ space – text’ characteristic for electromagnetic radiation signal contains the text information, the authors proposed a method to describe this characteristic. In this method, sparse decomposition in wavelet was used and sub‐band sparsity was defined. Variance mean ratio and correlation coefficients of sub‐band sparsity were combined as the features of electromagnetic radiation signals. By using this method, the authors can accurately and efficiently detect the text information leakage in electromagnetic radiation from a computer display without reconstructing the displayed image.