Field encryption for a unique key field

We have a field we need to encrypt but we have multiple RPG applicants that do a CHAIN and some SQL that do a SELECT WHERE on the field as a unique key. We need to let users find a record using this key field as we get lots of government data with this as the only unique value we can use for a lookup. If we encrypt the field in the database, is the only thing we need to do is encrypt the data the user enters before we issue the CHAIN command and then everything else works as usual?

Thanks

Mike Cunningham
VP of Information Technology Services/CIO
Pennsylvania College of Technology



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