Data protection for computer systems

Details Data protection for computer systems Data protection for computer systems

1989-02-17

1990-10-09

Tarcza, Thomas H.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 49, H04L 900

Patent

active

049625330

ABSTRACT:
A computer system uses security labels for evey word in memory. Each access to a memory location requires that the security level of the memory location be compared to that of a process which is making the access. If the security level of the process does not dominate that of the memory location, access is denied. Each time a memory location is modified, it is assigned a security level consistent with the levels of all of the data which was used to modify the memory location.

REFERENCES:
patent: 4802218 (1989-01-01), Wright et al.
Defense RDT&E Online System, Defense Logistics Agency, 10/86, pp. 4-20, 22, 34.

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