In case of using Oracle proxy authentication, the Password connection string parameter is optional unless you perform distributed transactions.
For more information on using Proxy Authentication see Connecting to Oracle with Proxy Authentication.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2