Oracle database security (Windows systems)

With Oracle, the Oracle internal account does not require a password. It uses Windows native authentication, by using Windows user logon credentials to authenticate privileged database users. During installation of Oracle server software, the Oracle Universal Installer creates the Windows local ORA_DBA group and adds your Windows user name to this group, giving you SYSDBA privilege. For anyone else to connect as internal without a password, the Windows user name must be added manually to this ORA_DBA Windows group. If you connect to a database using sqlplus, and connect as internal, and the database requests a password, check whether your Windows user name is part of the Windows local ORA_DBA group and that the Oracle server ORACLE_HOME\network\admin\sqlnet.ora file has the SQLNET.AUTHENTICATION_SERVICES parameter set to NTS. Note If you use an Oracle database and want to change the password Teamcenter uses to connect to the database, you must temporarily set the TC_DB_CONNECT environment variable and then re-encrypt the password.