You can configure key masking in order to generate repeatable output for strings. Configure a mask format to define limitations for each character in the output string. Configure source string characters that define which source characters to mask. Configure result string replacement characters to limit the masked data to certain characters.
You can configure the following masking rules for key masking strings:
Seed
Apply a seed value to generate deterministic masked data for a column. You can enter a number between 1 and 1,000.
Mask Format
Define the type of character to substitute for each character in the input data. You can limit each character to an alphabetic, numeric, or alphanumeric character type.
Source String Characters
Define the characters in the source string that you want to mask. For example, mask the number sign (#) character whenever it occurs in the input data. The Data Masking transformation masks all the input characters when Source String Characters is blank. The Data Masking transformation does not always return unique data if the number of source string characters is less than the number of result string characters.
Result String Characters
Substitute the characters in the target string with the characters you define in Result String Characters. For example, enter the following characters to configure each mask to contain all uppercase alphabetic characters: