Although the intrusion detection technique has been developed about twenty years

the technique in the whole is not mature

and there are many problems now that do not have the best solutions

such as: the high rate of false positives and negatives and the low efficiency of detection have been the bottleneck of development of IDS.This work proposes a new solution scheme for the problems

that is

applying the scanning technique to IDS.It dynamically compacts the rules bases of IDS and validates the alarms of IDS...