Database security issue.

First of all crate this pakage in sys  CREATE OR REPLACE PACKAGE SYS.enc_dec AS    FUNCTION encrypt (p_plainText VARCHAR2) RETURN RAW DETERMINISTIC;    FUNCTION decrypt (p_encryptedText RAW) RETURN VARCHAR2 DETERMINISTIC; END; CREATE OR REPLACE PACKAGE BODY SYS.enc_dec AS      encryption_type    PLS_INTEGER := DBMS_CRYPTO.ENCRYPT_DES                                     ...

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