You might be aware of the new Security requirements which applies to ACH Originators and Third-Parties with more than 2 million ACH payments annually and is effective on 30-Jun-2022.
www.nacha.org/.../supplementing-data-security-requirements-phase-2
The requirement is to ensure that Bank Account Numbers are non human readable when the data is "at rest". Meaning it needs to be obscured in the SQL tables.
I am doing final testing of a FREE GP Power Tools sample project which can be installed and used by any customer with GP Power Tools - Developer Tools module registered.
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Regards
David