Cloud computing offers many advantages, but with those benefits come a new range of security concerns. Gartner estimates that CASB will be a $3.1 billion market by 2015. Products in this market basically sit between end users and cloud services, injecting security protocols between the two. Some CASB vendors encrypt data before it goes into the SaaS application, or require two-factor authentication when changes are made to a document. For example, a rule can be set that any time a file that contains Social Security numbers is accessed that traffic must be encrypted.”]
Source: https://www.csoonline.com/article/2691247/how-the-cloud-is-changing-the-security-game.html