When it comes to securing your data from myriad threats, the SQL Server database can be easily counted as one of the best applications in vogue today. Amongst its several security features, encryption serves as the corner stone for ensuring complete safety of the stored data. There are different kinds of encryption implementation that the SQL Server database applies and amongst it TDE and cell level encryption are the most popular ones. Let’s look at them in detail.
Cell Level Encryption
At a cell level the encryption is applied before the data is actually stored in a specific column field. One of the interesting aspects of cell level encryption is that it is possible to have a separate key for every row of a specific column. Also the size of the encrypted column is directly proportionate to the data stored in it. One of the most widely used applications of cell level encryption is seen in access control via passwords. Further cell level encryption can be executed on a data repository protected by TDE encryption.
Database Level Encryption (TDE)
Covering a much broader area, database level encryption can be used to secure the entire database. From log files to even individual data files, it can cover everything except what is recorded through SQL. Now if you are looking for comprehensive protection, you can execute a volume level encryption by calling in Bitlocker.
Key Points to Keep in Mind
When you are looking to secure your data through encryption you should always start from high value data. Even the keys that you create should be protected with passwords. Another aspect that you need to keep in mind while working with keys is that misplacing them can land you in a big hassle. So as a matter of rule backup all keys that you create diligently.
Consider SSL Encryption while working over an unsecure network
If your database is accessed remotely though an unsecure or public network, it is important to implement SSL encryption even if your database is already encrypted at cell level. It would help you secure your logins when they are shared across a public network. Further it can go a long way in avoiding man in the middle attacks from compromising your data.
Recovering from an accidental data loss situation due to human error
In many cases, human error is often the cause behind a SQL database file or certain records getting deleted. An inadvertent delete action initiated by a user can compromise valuable records stored in your database. Now if you are looking to get back such data, then you should just grab a sql recovery tool like the advanced DataNumen SQL Recovery application. Its potent recovery algorithm can restore the deleted data within minutes and can work on nearly every media type. Further it has the capacity to recover data compromised due to a torn page and can even safely bring back data from an encrypted file too.
Alan Chen is President & Chairman of DataNumen, Inc., which is the world leader in data recovery technologies, including access recovery and sql recovery software products. For more information visit https://www.datanumen.com/