(1) the use of low-radiation equipment
The use of low-radiation computer equipment is to prevent computer radiation leakage of the fundamental measures. Because these devices in the design and production, has been possible to produce information radiation components, integrated circuits and connecting wires, etc. to take anti-radiation measures, so that the electromagnetic radiation of computer equipment to a minimum, the disadvantage is that the price of low-radiation computer equipment is relatively expensive.
(2) distance protection
Distance protection method, try to expand the safe distance to deal with classified computers, this method only applies to places that can use a larger protective distance. However, with the development of science and technology, the protective effect of this method is not ideal, and can only prevent external theft can not prevent internal theft.
(3) electromagnetic shielding technology
According to the size of the computer radiation and the needs of the objective environment, the computer room or host components to be shielded, is to prevent classified computer groups electromagnetic radiation leakage of effective measures. After the installation of electromagnetic shielding room, electromagnetic radiation signals can be closed in the electromagnetic shielding room, the best protective effect, but the electromagnetic shielding room higher cost. Do not have shielding conditions of the computer room, but also the computer radiation signal can be controlled in the region, to avoid radiation signals are intercepted.
(4) computer electromagnetic radiation interference technology
According to the principle of electronic countermeasures, will be able to produce a noise jammer placed next to the computer equipment, the noise generated by the jammer and the computer equipment produced by the information electromagnetic radiation together with the outward propagation of electromagnetic radiation, so that the electromagnetic radiation produced by the computer equipment contains secret information can not be re-reduction. This is an effective measure to prevent electromagnetic radiation leakage of computer information systems.
(5) the use of power filters
The use of power filters to prevent the electromagnetic signals leaked by computer equipment from spreading along the power lines, resulting in leaks.
(6) Use of fiber-optic cables or shielded cables
Transmission lines use fiber-optic cables or shielded cables to prevent electromagnetic signals leaked by computer equipment from spreading externally along the lines, resulting in leaks.
The use of computers to deal with classified information, should use low-radiation computer equipment or take shielding or interference and other anti-radiation security technology measures.
A, the use of low-radiation computer
The use of low-radiation computer equipment is to prevent computer radiation leakage of the fundamental measures. Because these devices in the design and production, may produce electromagnetic radiation components, integrated circuits, connecting wires, etc. have taken anti-radiation measures to minimize the electromagnetic radiation of computer equipment. Foreign recognition of the problem of computer radiation relatively early, the development of a series of safety standards, manufacturers also strictly in accordance with the provisions of the production of equipment that meets the standards, but these low-radiation computers are prohibited from being sold to our country. At present, China has been able to produce a relative shielding measures of the display and host box set of metal shielding cabinet equipment, electromagnetic radiation is smaller.
Two, take the computer electromagnetic shielding technology
According to the size of the computer radiation and the objective environment, the computer room or host components to be shielded, is to prevent the leakage of classified computer groups electromagnetic radiation effective measures. Computer room with a metal shielding cage (also known as Faraday cage) closed up, and metal shielding cage grounding, can effectively prevent electromagnetic radiation from computers and auxiliary equipment. Do not have the shielding conditions of the computer room, but also the computer radiation signal can be controlled in the region, to avoid the radiation signal is intercepted.
Third, take the computer electromagnetic radiation interference technology
According to the principle of electronic countermeasures, the use of certain technical measures, the computer's radiation information to interfere with the increase in the reception of the reduction of the difficulty of deciphering the computer is to prevent the leakage of electromagnetic radiation is an effective measure. At present, the implementation of electromagnetic radiation interference methods, mainly white noise interference and correlation interference two kinds.
Don't know your specific situation, so can only roughly say the next personal opinion. If the host radiation standards do not meet, you can buy a separate high-density anti-radiation chassis shell, plus later can effectively reduce the radiation to a very small safety value. A lot of other onboard excerpts should be explained, I hope it will be useful to you.