In this article, we will review Dynamic Data Masking in the Azure SQL database. Dynamic Data Masking is a feature to limit the sensitive data to the non-privileged users by hiding the data of a column. Data is not masked and stored in the disk. Masking is applied to the result set returned to the user. The users with “db_owner” permission on “UNMASK” permission can still see the unmasked data when they query the table.
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In this article we are going to talk about Static Data Masking, a new feature for the SQL Databases in SSMS. Static Data Masking feature previously was available only for the Azure SQL DB.
Dynamic Data Masking is a new security feature introduced in SQL Server 2016 that limits the access of unauthorized users to sensitive data at the database layer.
As an example of the need for such a feature is allowing the applications developers to access production data for troubleshooting purposes and preventing them from accessing the sensitive data at the same time, without affecting their troubleshooting process. Another example is the call center employee who will access the customer’s information to help him in his request, but the critical financial data, such as the bank account number or the credit card full number, will be masked to that person.
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