Open source data control for cloud services with Apache Ranger: 
As the movement to migrate enterprise data to the cloud gathers steam, there is an active debate on the best approach to securing and protecting it. But before we talk about the details of the various access control frameworks, let us first understand the breadth of challenges a company faces when it begins migrating its data to the cloud. First and foremost is the wide array of storage and analysis or compute services offered by cloud and third-party providers.
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