Source string characters are source characters that you choose to mask or not mask. The position of the characters in the source string does not matter. The source characters are case sensitive.
You can configure any number of characters. When Characters is blank, the Data Masking transformation replaces all the source characters in the column.
Select one of the following options for source string characters:
The Data Masking transformation masks characters in the source that you configure as source string characters. For example, if you enter the characters A, B, and c, the Data Masking transformation replaces A, B, or c with a different character when the character occurs in source data. A source character that is not an A, B, or c does not change. The mask is case sensitive.
Mask All Except
Masks all characters except the source string characters that occur in the source string. For example, if you enter the filter source character “-” and select Mask All Except, the Data Masking transformation does not replace the “-” character when it occurs in the source data. The rest of the source characters change.