Encryption In MDF File Possible?

Apr 28, 2006

I am working on a distributed application that will use a SQL Express 2005 MDF file for the primary application data storage. The program will be storing sensitive data and I would like to encrypt the data in it.

I have searched through the forums and cannot find any reference to how to enable encryption for an MDF file.

I thought about writing my own encrypt / decrypt functions, however, I'm using databound controls and do not have a home-grown data access layer that I can tap into to implement the encryption.

When I originally added the MDF file to my application, under the "Advanced" settings, I saw that I could switch an "Encryption" property to "True"... figuring that would do the trick. However, when the MDF file is created I get an error stating, "The instance of SQL Server you attempted to connect to does not support encryption".

What is the trick for encrypting data in an MDF file that is being used with databound controls? Remember that this will be a distributed app - so if there are any customizations that are required on the SQL Express side to support this - I will need to find some way to configure SQL Express on the target machines during my bootstrap install of it.

Any help would be greatly appreciated! Thanks!

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