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Encrypt SSN Example (TDE)


Encrypt SSN Example (TDE)

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Welsh Corgi
Welsh Corgi
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Does anyone have an example on encrypting a SSN Field using TDE?

Any help would be greatly appreciated.

Thank you,:-)

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http://www.sqlservercentral.com/articles/Transparent+Data+Encryption+(TDE)/66334/

The transparent part always gets me.:-)
Welsh Corgi
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Thanks for the link.:-)

I was hoping to get a simple example to encrypt an SSN.

Thank you.

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The TDE is a bit misleading. You might take a look at http://msdn.microsoft.com/en-us/library/ms179331(v=SQL.100).aspx

The way we do it is:

1) create certificates/keys (only needs done once)
2) open key
3) EncryptByKey
Welsh Corgi
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I have this example.


http://msdn.microsoft.com/en-us/library/ms179331.aspx


I can't have the SSN in the table.

I just want to encrypt an SSN in a simple manner.

Thank you for your responses.

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GilaMonster
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TDE is entire database encryption. Transparent encryption, data encrypted on disk, decrypted in memory. It protects against the theft of the data files or the backups. It doesn't protect columns.

To encrypt a column, you want to use the encryption functions, like EncryptByKey and DecryptByKey when you're inserting/updating/deleting data.

Gail Shaw
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Welsh Corgi
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GilaMonster (7/15/2014)
TDE is entire database encryption. Transparent encryption, data encrypted on disk, decrypted in memory. It protects against the theft of the data files or the backups. It doesn't protect columns.

To encrypt a column, you want to use the encryption functions, like EncryptByKey and DecryptByKey when you're inserting/updating/deleting data.


Oh Yes thank you.

How can I do the following without creating an additional column and have one column to store the SSN?
Do you have a simple example please?

Just say for example that I have a Table Named Mytable and a Column Named SSN. How do I encrypt it?

Thank you.:-)


http://msdn.microsoft.com/en-us/library/ms179331.aspx


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GilaMonster
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There's nothing about the column which makes it encrypted. You would need to encrypt the values when you insert (eg with EncryptByKey) and decrypt the values when you select then (eg with DecryptByKey)

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
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Welsh Corgi
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GilaMonster (7/15/2014)
There's nothing about the column which makes it encrypted. You would need to encrypt the values when you insert (eg with EncryptByKey) and decrypt the values when you select then (eg with DecryptByKey)


So this needs to be done via .NET, etc or what?

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GilaMonster
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No. T-SQL, with the T-SQL encryption functions like EncrypByKey and DecryptByKey, or whichever of the similar functions you identify as meeting your requirements for protection, key management and all the rest of the admin around encryption.

You certainly can do it in .Net if you want with whatever the .Net encryption functions are.

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
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