login Oracle db without expose password

1. H:\>sqlplus oemdba/qwerty@cdoc

   SQL*Plus: Release 11.1.0.6.0 – Production on Thu Oct 23 16:19:51 2008

   Copyright (c) 1982, 2007, Oracle.  All rights reserved.

   Connected to:
   Oracle9i Enterprise Edition Release 9.2.0.5.0 – Production
   With the Partitioning option
   JServer Release 9.2.0.5.0 – Production

   SQL> quit

2. cd C:\app\hliang\product\11.1.0\db_1\BIN
3. C:\app\hliang\product\11.1.0\db_1\BIN>mkstore -wrl C:\app\hliang\product\11.1.0 -create
   Enter password:

   Enter password again:

4. C:\app\hliang\product\11.1.0\db_1\BIN>mkstore -wrl C:\app\hliang\product\11.1.0 -createCredential CDOC oemdba qwerty
   Enter wallet password:

   Create credential oracle.security.client.connect_string1

5. C:\app\hliang\product\11.1.0\db_1\BIN>sqlplus /@cdoc

   SQL*Plus: Release 11.1.0.6.0 – Production on Thu Oct 23 16:33:44 2008

   Copyright (c) 1982, 2007, Oracle.  All rights reserved.

   ERROR:
   ORA-01017: invalid username/password; logon denied

   Enter user-name:
   ERROR:
   ORA-01017: invalid username/password; logon denied

   Enter user-name:
   ERROR:
   ORA-01017: invalid username/password; logon denied

   SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

   C:\app\hliang\product\11.1.0\db_1\BIN>

6. Add following lines into SQLNET.ora
   SQLNET.WALLET_OVERRIDE = TRUE
   WALLET_LOCATION =  (SOURCE =
   (METHOD = FILE)
   (METHOD_DATA =(DIRECTORY = C:\app\hliang\product\11.1.0))
   )
7. C:\app\hliang\product\11.1.0\db_1\BIN>sqlplus /@cdoc

   SQL*Plus: Release 11.1.0.6.0 – Production on Thu Oct 23 16:35:37 2008

   Copyright (c) 1982, 2007, Oracle.  All rights reserved.

   Connected to:
   Oracle9i Enterprise Edition Release 9.2.0.5.0 – Production
   With the Partitioning option
   JServer Release 9.2.0.5.0 – Production

   SQL> quit
   Disconnected from Oracle9i Enterprise Edition Release 9.2.0.5.0 – Production
   With the Partitioning option
   JServer Release 9.2.0.5.0 – Production

   C:\app\hliang\product\11.1.0\db_1\BIN>