However, AusCERT is aware that some Australian sites are experiencing DOS problems. Discussions with various organisations have indicated that a number of DOS attacks are unreported. Spikes in network traffic graphs for some Australian sites during the period Wednesday 9 February through Friday 11 February suggest that there is a possibility that these sites may have been attacked during the peak period of activity. However in the absence of any significant number of DOS reports directly to AusCERT, it is difficult to determine if these are the result of DDOS tools. We encourage any members requiring assistance to report activity to us and tell us how we can assist them.
Some statistics are available for the United States' experience.
A number of technologies have been used in the development of these tools. None of the concepts are new, although their association with these sorts of tools is. All tools use encryption to varying degrees. The algorithm varies depending upon the tool and the use. Encryption is used to hide information such as the list of agents used by a particular handler , and network communications between the client and handler .