Data Masker for SQL Server is a tool to replace sensitive data in test and development databases with realistic looking but false information. This process is sometimes called Data Sanitization, Data Masking or Data Protection. Data Masker provides a simple to use, repeatable method. Data masking is the process of protecting sensitive information in non-production databases from inappropriate visibility. After sanitization, the database remains perfectly usable - the look-and-feel is preserved - but the information content is secure.