Cloud adoption has historically been hampered by security concerns. All of Forrester's research shows this to be the number one impediemtn to adoption. Forrester just finished evaluating four cloud platform providers on the depth and breadth of their security controls. This Forrester Wave™ evaluates four of the leading public clouds along 15 key security criteria evaluations to answer this question. The participating cloud services providers were: AWS, CenturyLink Cloud, IBM SoftLayer, and Microsoft Azure. This report details our findings about how well each vendor fulfills our criteria and where they stand in relation to each other, to help S&R professionals select the right public cloud partner with the best options for security controls and overall security capabilities.

The results can be found here:  The Forrester Wave™: Public Cloud Platform Service Providers' Security, Q4 2014.