Types of Data Masking
Static Data Masking (SDM)

In Static Data Masking, data is first masked in the database and then is copied to a test environment so organizations can move the test data into untrusted environments or third-party vendors.

Dynamic Data Masking (DDM)

In DDM, second data storage is not needed. Data remains unmasked in the database, and upon request, data is masked and sent over. Contents are shuffled in real-time on-demand to make the data masked. Unmasked data is never exposed to unauthorized users. A reverse proxy is needed to achieve DDM. Other dynamic data masking methods are generally called on-the-fly data masking.

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