1. A computer-implemented method, comprising: identifying structured data for protection; creating, by a server computer system, an index of the structured data, the index comprising a set of Bloom filters and a list of token type patterns, wherein the set of Bloom filters comprises a plurality of Bloom filters; generating a data loss prevention (DLP) policy comprising the index and a DLP response rule; and distributing the DLP policy comprising the index and the DLP response rule to an endpoint device, wherein the set of Bloom filters and the list of token type patterns in the index are to be used together for detection of structured data in free text data associated with the endpoint device, and the DLP response rule is to trigger an action to protect the structured data responsive to the detection of the structured data in the free text data.