The invention discloses an access control table and safety policy database method in data communication field, including: 1, initializing a Radix tree of access control table or safety policy database; 2, constructing clauses and subclauses of a rule; 3, inserting the rule in the Radix tree; 4, repeating the steps 2 and 3, in order to insert all the rules in the Radix tree, and forming the complete access control table or safety policy database; 5, searching matching rules.

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