Security policy of multilevel security DBMS is expressed by many models. One of them is access control model.

多级安全数据库的安全策略需要各种模型来表达，访问控制模型是其中之一。

youdao

Security policy of multilevel security DBMS is expressed by many models. One of them is access control model.

多级安全数据库的安全策略需要各种模型来表达，访问控制模型是其中之一。

youdao