G - Physics – 06 – F
Patent
G - Physics
06
F
354/236
G06F 12/00 (2006.01) G06F 1/00 (2006.01) G06F 13/20 (2006.01) G06F 21/00 (2006.01)
Patent
CA 2032795
ABSTRACT Secret information can sometimes be illicitly scavenged from host-readable and -writable memories in a terminal that accesses a computer. Access-mediating security kernel soft- ware attempts to clear such memories upon particular occa- sions such as, e.g., an attempt by a user to switch from ac- cessing a more highly-secret process to accessing a less highly-secret process. A group o e useful "black box" test- ing operations permits the security kernel to obtain certain empirical information about the characteristics of the ter- minal. The sending of a predetermined number of NUL char- acters serves as a timer both for the security kernel and for the terminal during some of the "black box" operations. In addition, specially designed terminal-control software may cooperate with the security kernel to support particular terminal functions such as a secure-reset routine responsive to a secure-reset command sent by the host.
Hu Wei-Ming
Kahn Clifford E.
Mason Andrew H.
Sichel Peter A.
Digital Equipment Corporation
Hu Wei-Ming
Kahn Clifford E.
Mason Andrew H.
Sichel Peter A.
LandOfFree
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