In versions 6.0 and 6.5 of Microsoft SQL Server, 16-bit and 32-bit client software can encrypt data online by setting encryption options when using the multi-protocol network library.
SQL Server relies on the Microsoft Windows NT RPC application program interface to complete network data encryption.
Windows NT RPC uses 40-bit RC4 encryption method. This method is exportable, so there is no difference between the US and international versions of this encryption method.