Unit 1 Assignment 1 Signature Based Techniques
The signature based technique is easier for deployment, since it does not need to learn the environment[5]. It is very effective against known attacks, but it cannot detect new intrusions until it is updated with the new signatures on its database.Therefore, they are easy to evade and can be easily bypassed by intruders by modifying known attack signatures and also target systems, that are not updated with new signatures that detect the modification. The architecture shown in Fig.1, uses the preprocessing to evaluate the signature and compare those signatures to the known signatures in the database. If there is a match then alert is issued, else the detection system does