Encryption on database tables MSSQL 2008

Hello experts,

DO you have any tutorial, suggestions  on how to encrypt tables on database MSSQL 2008?
Once they are encrypted, would it affect my ASP.net applications I have when i call such tables?


thank you
shpresaAsked:
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Dave HoweSoftware and Hardware EngineerCommented:
Depends on how you want to encrypt.
If you are interested in at-rest encryption, then you can simply encrypt the storage media (bitlocker, efs, whatever)

If you want to do explicit encryption, then you need to alter apps to use the 2008 crypto primitives (such as ENCRYPTBYKEY - that means coding changes.

if you want to do this without altering the code, then you need to follow this guide to Transparent Data Encryption - might take a couple of looks before you get the idea, so feel free to post follow up questions in this thread for clarification :)
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shpresaAuthor Commented:
Hi thank you for the info.

I was interested for encryption at rest and in transit, when data is moving.
Without altering the code would be great. Is the transparent data encryption used when data is in transit?
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Dave HoweSoftware and Hardware EngineerCommented:
TDE is similar to the on the fly disk encryption, but is done by the database engine rather than the operating system - think of it as on-the-fly table encryption.  

For that reason, it is effectively encrypted only "at rest" - the data from app to engine will be plaintext, so should be further protected by TLS at the session level between app and engine (the technology is the same as is used for https)

I did a little googling, and found This Article which may explain your options better.
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