本书系统论述了电磁信息泄漏及防护的理论、方法和最新技术。其特点是将电磁辐射与传播理论及信息论相结合,形成了符合电磁信息特征的电磁信息泄漏模型。本书定义和分析了电磁信息泄漏限定因子、受限因素和取值范围,提出了噪声条件下的重构复现模型,并给出了电磁信息重构复现的质量因子,初步形成了一种电磁信息泄漏及防护技术的理论体系。同时,基于模型提出了抗泄漏、抗截获和抗复现的系统性分级防护策略。本书适合于相关领域研究人员及工程技术人员使用,也可供相关专业研究生阅读、参考。The book systematically discusses theory,method and latest technology of EM information leakage and countermeasure. In particular,an EM information leakage modelis created through incorporate information theory and EM radiation theory,which conforms to EM information characteristics. In the model,EM information leakage constraint factor,the restricted factors and value range are defined and analyzed. Secondly,this book proposes a reconstruction and reproduction model under noise environment,in addition,a quality factor is provided to evaluate quality of reconstruction andreproduction. Finally,theoretical system for EM information leakage and countermeasure technology is initially formed,and a systematically hierarchical countermeasurestrategy is developed based on proposed model,namely,antileakage layer,antiinterception layer and antireconstruction layer.The book is a suitable reference book for relevant researchers,engineers and postgraduate students.