In this paper,the Bell-LaPadula formal model for secure computer systems is introduced,and the key theoretical results are proved. In addition, we also point out that the sufficient and necessary condition,given by re...In this paper,the Bell-LaPadula formal model for secure computer systems is introduced,and the key theoretical results are proved. In addition, we also point out that the sufficient and necessary condition,given by reference[11], for secure information system is wrong. Exploiting a new concept,the correct sufficient and necessary condition is presented.展开更多
文摘In this paper,the Bell-LaPadula formal model for secure computer systems is introduced,and the key theoretical results are proved. In addition, we also point out that the sufficient and necessary condition,given by reference[11], for secure information system is wrong. Exploiting a new concept,the correct sufficient and necessary condition is presented.
