Password Trick :-:Database Administrator

      I am going to discuss one trick in database using which  you can actually access to the account of any user in oracle database without the particular user getting informed about it. For that we require  the dba privilige.  so here are the few steps that we have to follow:-
 1. login into oracle database as sysdba
  sql> conn /as sysdba 
  connected
 2. sql>  create user testuser identified by testuser;
 user created.
  (here we assumed that there is no user , so we created new  user ) 
username = testuser , password = testuser
3. now we need to login in database to check first that the       username and password given is correct or not.
sql> conn testuser/testuser;
connected
              now the actual trick begins 
4. login into dba account using the previously  discussed syntax  
i.e   conn / as sysdba
 5. now , query the username and password from sys.user$ view
sql> select name , password from sys.user$;
6. now u have to copy the password for a particular user i.e testuser from the view and write it in notepad.
7. now  change the password of the testuser by following command
sql> alter user testuser identified by password;
 8. now login using new password 
sql> conn testuser/password
connected 
9. so we changed the password of the testuser. 
 inorder to restore the previous password of testuser , we have to again login as sysdba and run the following command
 sql> alter user testuser identified by values '<old hashpassword>';
user altered
here we have to paste the password that we had  copied from sys.user$ view
10. now check the user account by logging into database using old password
sql> conn testuser/testuser;
connected.
hence we can login into anyone's account by using the above procedure,
enjoy the script guys:)