No, the Easysoft ODBC-InterBase Driver does not need to do this, as all encryption / decryption is handled by the InterBase client and server.
Let's say you have a InterBase table with two columns; one is an integer column and the other is an encrypted column. When the Easysoft ODBC-InterBase Driver reads the table from the InterBase client, the client says you have both an integer and a string column. The InterBase Server and client decrypt the string column if selecting from the column, and encrypt the string column if you are inserting. The encryption / decryption process is transparent to the Easysoft ODBC-InterBase Driver or application.