White listing is usually an innovative technique which is meant to neutralize malware. Instead of looking for known malware only, this technique also prevents the execution of all the computer codes, except for those which were identified beforehand as being reliable. Following this approach, you avoid the born limitations in antivirus software updates. Additionally, the computer applications the administrator does not want are prevented from working since they are not on the white list. The viable implementations of this technique include tools for automatizing the inventory and the maintenance of the white list process.
The suspicious behaviour doesn’t try to identify already known viruses, but monitors the activity of all the programs. If a programs tries to write data to an executable file, the antivirus software can signal this suspicious behaviour, alerting the user and asking them what to do. Unlike the dictionary approach, the suspicious behaviour approach offers protection against viruses which don’t yet exist in the virus dictionaries today. On the other hand, it can also signal a larger number of false positives, users being alerted all the time and becoming uninterested in some of the alerts. If the user clicks Accept with all the alerts, the antivirus software offers no advantages. This problem got worse in 1997, when a lot of malware used to mess up with the executable files without this false positive alert being taken into consideration. Therefore, the most modern antivirus software programs use this technique less and less.
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