My requirement is:
Data from Azure Blob will load into Azure SQL server with 10 columns.
I need to encrypt the data for 3-4 columns in Azure SQL server.
Is it possible with Azure Key Vault?
Is this possible or is there any other secure way to do encryption in Azure SQL?
Yes, it's called Always Encrypted (also: Column-based Encryption). See here how to implement it: https://learn.microsoft.com/en-us/azure/sql-database/sql-database-always-encrypted-azure-key-vault?tabs=azure-powershell
BTW it is Key Vault not Key Volt, From the docs Definition
Azure Key Vault is a tool for securely storing and accessing secrets.
A secret is anything that you want to tightly control access to, such
as API keys, passwords, or certificates.
Is it possible with Azure Key Volts?
No
If you want to encrypt data columns of SQL server you need to use Encryption at Rest
Related
We have a requirement to protect PCI data. Dynamic Data Masking is insufficient because Snowflake admins can circumvent the masking to reveal data. We would like something that is functionally equivalent to Azure SQL Always Encrypted where column encryption is secured with a key vault certificate. What options do we have with Snowflake? Do we require a third party solution?
My project has a requirement to encrypt a sensitive field column in SQL server table but the encryption/decryption key shall be kept outside SQL environment to ensure maximum data security.
Thycotic server is one secret server to store and secure passwords. I am trying a POC to check if encryption key can be generated via Secret server and can be used to encrypt table column in SQL server.
I haven't found much related to this on the Thycotic website or on google.
How can this be achieved if feasible?
In SQL-Server's Always Encrypted feature, is there a way to store the Master Key in a Centralized Key Vault?
I know I can use Azure Key Vault or Local Windows Key Store. But I was looking for another option to have it outside the server. For example, Symantec Encryption Management Server(pdf).
What is the difference between using SQL Server SSL (Encrypted=true in the connection string) + TDE, vs using SQL Server Always Encrypted?
With regards to RGPD, is one more adapted than the other?
Always Encrypted exists to solve more than just the issue of making sure data is encrypted in-transit. In fact, that's not even the primary concern that Always Encrypted solves.
The big issue that Always Encrypted solves is that with Transparent Data Encryption (TDE), the keys and certificates which secure the encrypted data are themselves stored in the database. This could be a concern for someone considering putting their SQL Server database in the cloud, because the cloud provider then ultimately has the secrets for decrypting the data.
With Always Encrypted, the Column Encryption Key (CEK), which is used to encrypt/decrypt column data, is stored in the database in its encrypted form. But here's the kicker - the key used to encrypt/decrypt the CEK is stored outside the database, leaving the database unable to decrypt the data on its own.
All the database can do is
Provide the encrypted CEK,
provide the location of the CMK, and
serve/store pre-encrypted data.
It's up to the client to get the Column Master Key (CMK) from the key/certificate store wherever that's located, then use the CMK to decrypt the CEK, and use the decrypted CEK to encrypt/decrypt data.
So that's the conceptual difference. Here are a couple pages that go into the details of it:
Overview of Key Management for Always Encrypted (Microsoft docs)
SQL Server Encryption: Always Encrypted (Redgate article)
Be aware that Always Encrypted comes with some hefty drawbacks with regard to querying data and other things. This article gives a pretty good list of limitations. Some of these drawbacks can be mitigated using Always Encrypted with secure enclaves.
Consider an SQL Server in Azure with transparent data encryption enabled, and with the use of Azure Key Vault for key management. Data is encrypted at-rest in the Azure data center in <whatever> country, but the Key Vault sits on-premise in the customer's own data center.
Applications (also hosted in Azure and thus being physically placed in <whatever> country) can access the database from the time a successful round-trip to the Key Vault has been made.
To what entity is the data access bound (which entity holds the symmetric key)? Is it the database that holds the symmetric key so that all incoming connections will be able to see the unencrypted data? Or is the key stored per connection so that the database re-connectes to Key Vault when each new connection is established?
We would like to be able to shut down the database access, solely by shutting down the on-premise Key Vault. That is: no matter what happens to the data center, data access in the cloud can always be stopped from the Key Vault. Data can be decrypted only because the key is cached somewhere. Can we force the caching to timeout after, say X, seconds, thereby forcing the database to reconnect to Key Vault and ask for the key again? This would allow us to shut down the Key Vault, rendering the data useless after these X seconds.
SQL Server doesn't support an external DEK - it is stored in the database encrypted by the DEK protector, a cert or asymmetric key which can be in the Key Vault. In this scheme, the key vault is not needed on every I/O, but there is a timeout after which SQL Server needs the key vault to unwrap the DEK again.