method and recorded media for security grade to measure the network security condition

PURPOSE: A method for setting security ranks reflecting variable security condition and a recorded medium therefor are provided to analyze and process detected invasion data and system management data, and to measure a current network situation with a security rank, then to operate a state transferring model, thereby establishing and performing strategies in consideration of flexible network situations. CONSTITUTION: If invasion or attach detection data are received through a network, an analyzer analyzes invasion or attach risks, importance of an attacked target, traffic amount and traffic frequency of the invasion data, and seriousness of the invasion data based on a preset analysis standard. The system sets security ranks based on a preset security rank table by analyzed results. The system decides whether to maintain the set security ranks according to variable security conditions, and re-controls the security ranks.