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README.md
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@@ -30,7 +30,7 @@ Ilmenau University of Technology is a university of the Free State of Thuringia
Denial-of-service attacks are a serious and ever-growing threat.
In the digital age, many systems are connected via the Internet or private networks. Many companies, hospitals and public authorities have become popular targets of attack due to inadequate protective measures and high impact ([infopoint-security.de](https://www.infopoint-security.de/cyber-angriffe-auf-deutsche-krankenhaeuser-sind-um-220-prozent-gestiegen/a26177/)). Such attacks are usually carried out for financial or even political reasons, but rarely for the mere disruption or destruction of the target.
In DoS\footnote{Denial of Service} and DDoS\footnote{Distributed Denial of Service} attacks, servers and infrastructures are overloaded with a flood of meaningless requests to such an extent that they are prevented from operating normally. This can result in users no longer being able to reach the services offered by the operator and data can be lost in the attack.
In DoS (Denial of Service) and DDoS (Distributed Denial of Service) attacks, servers and infrastructures are overloaded with a flood of meaningless requests to such an extent that they are prevented from operating normally. This can result in users no longer being able to reach the services offered by the operator and data can be lost in the attack.
In this case, even weak computers can cause great damage to much more powerful recipients. In botnets, the attacks can additionally be coordinated by several computers at the same time, originate from a wide variety of networks ([tecchannel.de](https://www.tecchannel.de/a/trend-micro-latente-gefahr-durch-botnet-sdbot,2024687)) and thus simultaneously increase the attack power and make detection more difficult.
The imbalance between simplicity in generating attacks versus complex and resource-intensive DoS defenses further exacerbates the problem. Although occasional successes are achieved in the fight against DoS attacks (e.g., shutting down some large "DoS-for-hire" websites), the volume of DoS attack data continues to grow. Between 2014 and 2017 alone, the frequency of DoS attacks has increased by a factor of 2.5 and the attack volume is almost doubling every year ([ns-cdn.neustar.biz](https://ns-cdn.neustar.biz/creative_services/biz/neustar/www/resources/whitepapers/it-security/ddos/2016-apr-ddos-report.pdf)). Damage is estimated at between $20,000 and $40,000 per hour worldwide ([datacenterknowledge.com](https://www.datacenterknowledge.com/archives/2016/05/13/number-of-costly-dos-related-data-center-outages-rising)).