Sensitive Data on Table

Hi All

We are on SP8 - I want to load a table from sap to hana using slt and the table have sensitive data in one column ..I can drop the column but unfortunately the column is a part of key and if i drop i can't maintain the integrity of the records as  this  would be duplicate  the records without the sensitive info column ..

I was thinking of scrambling the data but i was not sure how it works if the record is an update

Thanks