The Soft TEMPEST Of Computer Video Information Leakage

Information protection technique , called TEMPEST ( Transient Electromagnetic Pulse Emanation Standard) technology for short, is an important research direction of current computer information security. Ordinary computers will leak out information outwards by way of electromagnetic radiation when processing information. By the radio system, the eavesdroppers can catch various kinds of radiation spectrum and reconstruct the information computers are dealing with so as to obtain useful material and information. It is a serious threat to computer information security of a nation in such fields as politics, economy and military affairs. At the end of the last century the research started and mostly focused on SOFT TEMPEST Characters (Chinese characters) in our country. At present, the main aspect of information leaking is the multi-media information with the text and image. The paper aims at carrying on the SOFT TEMPEST research...