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Data loss prevention (DLP) refers to the identification and monitoring of sensitive data to ensure that it's only accessed by authorized users and that there are safeguards against data leaks. Major insider threats as well as more stringent state privacy laws triggered the adoption of DLP in 2006.
DLP is a method of inspecting and keeping sensitive data from leaving the allowed perimeter. DLP systems are only concerned with the data passing over some kind of perimeter gateway device, such as through emails, instant messages and Web 2.0 applications.
DLP has the following key features: