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Erschienen in:
2019 | OriginalPaper | Buchkapitel
1. Introduction
verfasst von : Taikang Liu, Yongmei Li
Erschienen in: Electromagnetic Information Leakage and Countermeasure Technique
Verlag: Springer Singapore
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Abstract
In the information age, information has become a key factor affecting a nation’s development and social progress. Due to the rapid development of large-scale integrated circuit, computer technology and information equipment, the cognition and definition of information are updating and developing constantly, forms and types of information, its representation and standardization, and methods of information dissemination are continuously enriching. From the perspective of information security, electromagnetic information can be divided into two categories: one is the information with the purpose of the transmission, such as the plain code or the encrypted code transmitted by telegraph equipment; the other one is the natural information of the equipment, the electromagnetic radiation or leakage to space. The former is the electromagnetic information transmitted for communication, which is active and intentional; the latter is the electromagnetic radiation or leakage of equipment, which is passive and unintentional.