计算机及其外部设备的防信息泄漏技术

Techniques for preventing Information leakage of computer and its peripheral equipment

计算机中的电磁泄漏严重威胁系统的安全,必须采取有效的防泄漏措施.介绍了计算机中信息的泄漏方式,分析了TEMPEST技术研究的内容,探讨了利用噪声干扰源,采用屏蔽技术、"红"/"黑"隔离技术、滤波技术和布线与元器件选择等计算机防泄漏技术,以及键盘、软盘驱动器、CRT显示器和打印机等外部设备的防泄漏技术,探讨了发展我国TEMPEST技术的5项措施.

The electromagnetism leakage of a computer has great threaten to system security, and some measures must be implemented to prevent the electromagnetic leakage. The ways of information leakage in a computer and the content of TEMPEST (transient electromagnetic pulse emanation standard) technique are analyzed, and some information leakage preventing techniques for a computer are discussed by noise interruption, shielding, 'red'/ 'black' line separation, wave filtering, and configuration of bus lines and selection of parts. The information leakage preventing techniques for peripheral equipment, such as keyboard, disk driver, CRT monitor and printer also discussed. Finally, five measures are proposed for developing TEMPEST technology of our country.