# Data Masking

One increasingly important goal with data transformation is data masking. With privacy becoming increasingly important to organizations, the ability to mask sensitive data as needed is a priority. Treasure Data filter functions provide that level of security using the following:

* [Encrypt Filter Function](/products/customer-data-platform/integration-hub/batch/import/filter/encrypt-filter-function)
* [Hash Filter Function](/products/customer-data-platform/integration-hub/batch/import/filter/hash-filter-function)
* [Decrypt Filter Function](/products/customer-data-platform/integration-hub/batch/import/filter/decrypt-filter-function)