Analysis-based (Dynamic) Filtering Systems

Organisational Requirements

This form of filtering usually requires organisation to have a server with enough capacity to run effectively in the case of a software solution as it can add a considerable amount of additional loading on the system.

Advantages

The advantage of this system over other types of filters that use a blacklist or whitelist of web sites is that it can classify new sites on-the-fly should they not be present in the blacklist. 

Challenges

However, this requires a considerable amount of processing power and introduces latency while this is taking place.  Some filters employing this technology will allow unfiltered access for the first access to the uncategorised site while it is classifying it and subsequent accesses will be blocked should it meet the blocking criteria. 

Should ISPs Use Analysis-based (Dynamic) Filtering Systems?

Because of the processing power required and subsequent latency introduced this sort of solution is not suitable for ISPs and carriers.