公开(公告)号：US4962533A

公开(公告)日：1990-10-09

申请号：US312142

申请日：1989-02-17

申请人： Steven D. Krueger ,  Martha A. Branstad ,  Stephen T. Walker

发明人： Steven D. Krueger ,  Martha A. Branstad ,  Stephen T. Walker

IPC分类号： G06F12/14 ,  G06F1/00 ,  G06F21/00

CPC分类号： G06F21/62 ,  G06F21/79

摘要： 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.

摘要翻译： 计算机系统在内存中使用安全标签。 对内存位置的每次访问都要求将内存位置的安全级别与进行访问的进程进行比较。 如果进程的安全级别不支持内存位置的安全级别，则访问被拒绝。 每次修改内存位置时，都会为其分配与用于修改内存位置的所有数据的级别一致的安全级别。