Data protection for computer systems
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 9, 1990
Grant Date -
N/A
app pub date -
Feb 17, 1989
filing date -
Feb 17, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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