Data-leak protection goes by many names: Data loss protection or prevention, anti-data leakage, insider-threat protection, outbound content management just to name a few. The point of these products is to monitor, document, and often prevent sensitive information from leaving an organization without authorization.
The definition of "sensitive data" varies by company, too. Some types of data are obviously of a sensitive nature, including credit-card, social-security, or bank account...
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