Tim Landers has published a new article on developerWorks on securing Hadoop installations so that you can actually trust the results you are getting from it. From the abstract:
"All of the benefits the Hadoop environment provides hinge on the addition of security features that are provided by an external security software solution. Just as Hadoop big data environment configurations differ, so do the security requirements for protecting that environment. All big data environments are risk-prone; therefore, they must have built-in protection against unauthorized use, threats, cyberattacks, invalid input data sources, and other challenges. To that end, IBM offers IBM® InfoSphere® Guardium®, a state-of-the-art solution for securing the Hadoop environment and protecting big data. Learn more about InfoSphere Guardium and how it can secure your Hadoop environment.