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Configure key masking for numeric source data to generate deterministic output. When you configure a column for numeric key masking, you assign a random seed value to the column. When the Data Masking transformation masks the source data, it applies a masking algorithm that requires the seed.
You can change the seed value for a column to produce repeatable results if the same source value occurs in a different column. For example, you want to maintain a primary-foreign key relationship between two tables. In each Data Masking transformation, enter the same seed value for the primary-key column as the seed value for the foreign-key column. The Data Masking transformation produces deterministic results for the same numeric values. The referential integrity is maintained between the tables.