Azure used for SQL based Big Data Support. However, Hadoop is written in Java and was not available to .NET developers. Microsoft launched Hadoop service to make it possible to distribute the load and speed up big data computations.

Hello Jasour,

Comparison on Windows Azure and Hadoop (w.r.t Security).

For Security in Windows Azure, refer this link.

http://www.windowsazure.com/en-us/support/legal/security-overview/

For security vulnerabilities in Hadoop [Open Source Edition] refer this link

https://issues.apache.org/jira/browse/HADOOP-4487

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Srikrishnan.V

Do take a look at the work of one of my PhD students [Rizwana Shaikh] in the area of building a trust model for cloud security.