How to enable encrypted links to a SQL Server instance?
You can set up using server/client network energies: http://support.microsoft.com/kb/316898
You still require certifications, and also to define encryption in the link string. We make use of an offline CA to create our certifications making use of OpenSSL, and afterwards install on the customers and also web server w/ MMC.
You can allow the os care for it using an IPSEC policy. With SQL Server, you have to have a relied on SSL certification, yet below's just how : Books Online - How to: Enable Encrypted Connections to the Database Engine.