For example when a new file is created at least the

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For example, when a new file is created, at least the creating process should gain access to the file. In this case, a protection state operation create_file(process, file) would add a new column for the new file and add read and write operations to the cell (process, file) . Lampson’s access matrix model also defines operations that determine which subjects can modify cells. For example, Lampson defined an own operation that defines ownership operations for the associated object.
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