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    • 9. 发明授权
    • System and method for tamper detection
    • 用于篡改检测的系统和方法
    • US5689243A
    • 1997-11-18
    • US585325
    • 1996-01-11
    • Mark E. Bianco
    • Mark E. Bianco
    • G06F1/00G06F21/00G07C1/32G09F3/03G06F7/04
    • G09F3/0394G06F21/552G07C1/32G06F2211/007
    • A system and method that provides an electronic indication that unauthorized access has been gained to a system. The mechanisms used by the present invention cannot be forged, bypassed, or subverted. In fact, even persons authorized to access the environment cannot do so without leaving evidence. When an intrusion is detected, a random number is generated. This random number, referred to as an audit count, is then encrypted and stored, and a sequence number is incremented. To recover this information at a later time, a trusted individual inserts an external device containing a decryption key. The decryption key is extracted, and the encrypted audit count and sequence number are decrypted and displayed. Periodic verification that the audit count and sequence number have not changed provides assurance that access has not been gained to the system.
    • 提供电子指示的系统和方法,以向系统获得未授权的访问。 本发明使用的机构不能伪造,旁路或颠覆。 事实上,即使被授权进入环境的人也不能没有留下证据。 当检测到入侵时,产生随机数。 这个被称为审核计数的随机数然后被加密和存储,并且序列号被递增。 为了在稍后时间恢复该信息,受信任的个体插入包含解密密钥的外部设备。 提取解密密钥,并对加密的审计计数和序列号进行解密和显示。 审计计数和序列号未更改的定期验证提供了对系统尚未获得访问的保证。