Dear Karmel

There is significant literature on Distributed Denial of Service (DDoS) applications and risk management. The first paper that I found focusses on the vulnerability of web applications to DDoS attacks, and presents an active distributed defense system that has a deployment mixture of sub‐systems to protect web applications from DDoS attacks.

Xiang, Y. and Zhou, W. (2006) "Protecting web applications from DDoS attacks by an active distributed defense system", International Journal of Web Information Systems, Vol. 2 Iss: 1, pp.37 - 44

In terms of literature review, the following two publications are relevant. The first might come in handy as proposes some measures for dealing with such attacks.

Abouzakhar, N.S. and Manson, G.A (2002) "An intelligent approach to prevent distributed systems attacks", Information Management & Computer Security, Vol. 10 Iss: 5, pp.203 - 209

Ratnasingam, P. (2002) "The importance of technology trust in Web services security", Information Management & Computer Security, Vol. 10 Iss: 5, pp.255 - 260

You can also read up on the following survey related study and focussed on the vulnerabilities of the cloud platform affecting businesses trading on the internet.

Aleem, A. and Sprott, C.R. (2013) "Let me in the cloud: analysis of the benefit and risk assessment of cloud platform", Journal of Financial Crime, Vol. 20 Iss: 1, pp.6 - 24

Kind regards,

Nicholas

Dear Kamel,

I would also suggest a number of paper dealing with DDoS Issue in the cloud environment in particular.

these papers are more - in depth - compared to the papers mentioned by Mr. Chileshe. 

"Can We Beat DDoS Attacks in Clouds?", Yu et al. , IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, 2013

"Cloud security defence to protect cloud computing against HTTP-DoS and XML-DoS attacks" Chonka et al., Journal of Network and Computer Applications, 2011

"Security Analysis of Cloud Computing", Frederick Carlson, URL: http://cryptome.org/2014/04/cloud-sec-analysis.pdf 

There is also a Springer Monograph book entitled "Distributed Denial of Service

Attack and Defence" by Shui Yu where a chapter is dedicated to DDoS in the cloud (related to the first paper) if you need more background information.

Hope you will find them helpful, 

Good luck,

Regards