Hi luigidep, Your question is somehow missleading. The masking engine profiling is done at the level of table colomns, not at the level of values you provied to create your own masking values. If the question is you want to mask first names and last names on your table using the values from the predefined list you provide. have a look here you have the steps to follow "https://docs.delphix.com/display/DOCS/Managing+Algorithm+Settings#ManagingAlgorithmSettings-_Toc420683033" section "Secure Lookup Algorithm" Regards, Mouhssine