Data leak protection (DLP) is a way to prevent APT (advanced persistent threats) from being used when it leaves your network. DLP done right can significantly minimize data exfiltration damage if scoped across the data types most likely to be viewed or stolen. Secure Islands’ products work by using Boolean logic-based policy statements to detect, intercept, and prevent data from leaking into the wrong hands. They expand on ADRMS’s default set of protected document types (mostly Microsoft Office files)”]
Source: https://www.csoonline.com/article/2969372/how-to-make-stolen-data-worthless.html