Communications: electrical – Continuously variable indicating – With meter reading
Patent
1996-01-11
1997-11-18
Hofsass, Jeffery
Communications: electrical
Continuously variable indicating
With meter reading
34082531, 340541, 340568, 380 23, G06F 704
Patent
active
056892438
ABSTRACT:
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.
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Denson-Low Wanda
Grunebach Georgann S.
Hill Andrew
Hofsass Jeffery
Hughes Aircraft Company
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