The Limitations of TDE
Although TDE offers many benefits over column-level encryption, it has some of its own limitations, which are important to consider. They include
TDE is not granular like column-level encryption. The entire database is encrypted, but only on disk. Sensitive data such as Social Security numbers or credit card numbers can be seen by anyone who has permission to access those columns. TDE also does not prevent DBAs from viewing any data in the database.
TDE does not protect communications between client applications and SQL Server. ...
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