Cloud computing is the most dynamic field of IT industry. It is becoming very famous due to its less resource consuming and higher output. Though Cloud computing is very vast and useful technology but it is not remained untouched from attackers or hackers. The most common attack notified on the cloud environment is DDoS attack. DDoS attacks i.e. Distributed Denial of service attacks happens on a cloud environment in such a way that, two or more than two attackers sends the multiple SOAP requests at the same cloud server and consume all the legitimate resources. From the study it has been concluded that, none a system is developed so far to prevent the DDoS attacks completely because even the detection of DDoS attacks is a major issue and prevention is a very big thing to achieve after detection and mitigation. This paper is focused on underlying the introduction about DDoS attacks and the next part of the paper is followed by the comparative analysis of the different techniques and algorithms used in detecting the DDoS attacks in cloud environment.

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The cloud computing is a discreet system which provides a lade system for the users in which a user can surf the online software facility. The cloud system is considered as the hosted service in which a particular user can access the cloud system remotely by using mobile applications or by using the browsers. Though the cloud computing provides so many utilities but there are also some holes in the service. Amongst all the security issues of the service come on the top. The security is the most important thing whenever you design any hardware or software. If the system is not secure then it will not be worth to use it. So this paper is emphasising on some security issues and their solutions to make the cloud system better.

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