Password in Oracle is combination of username and password

I tested this intersting case and found password in Oracle stores information about user also.

Lets see this: -
Create 2 users with same passwords

SQL> create user sac2 identified by arora;

User created.

SQL> create user sac3 identified by arora;

User created.

And see this. Passwords are different!

SQL> select username,password from dba_users where username in ('SAC2','SAC3');

USERNAME PASSWORD
------------------------------ ------------------------------
SAC3 14B4A488EC66A22B
SAC2 BF07E5BFF7A43D66

Now lets try changing the password of SAC2 with the password of SAC3.

SQL>
SQL> alter user sac2 identified by values '14B4A488EC66A22B';

User altered.

Finally, lets try connecting

SQL> connect sac2/arora
ERROR:
ORA-01017: invalid username/password; logon denied


It fails ..

Now create another user in a different database by the name SAC2:

SQL-DB2> create user sac2 identified by arora;

User created.

SQL-DB2> select username,password from dba_users where username='SAC2';

USERNAME PASSWORD
------------------------------ ------------------------------
SAC2 BF07E5BFF7A43D66

The password matches with the password of SAC2 of first database

Conclusion:
Oracle doesnot store same passwords alike.It uses a combination of username and password. But the trick to hack the password is still unknown to me.