Database Encryption in SQL Server 2008 Enterprise Edition
SQL Server Technical Article
Writers: Sung Hsueh
Technical Reviewers: Raul Garcia, Sameer Tejani, Chas Jeffries, Douglas MacIver, Byron Hynes, Ruslan Ovechkin, Laurentiu Cristofor, Rick Byham, Sethu Kalavakur
Published: February 2008
TDE does not replace cell-level encryption, EFS, or BitLocker. This white paper compares TDE with these other encryption methods for application developers and database administrators. While this is not a technical, in-depth review of TDE, technical implementations are explored and a familiarity with concepts such as virtual log files and the buffer pool are assumed. The user is assumed to be familiar with cell-level encryption and cryptography in general. Implementing database encryption is covered, but not the rationale for encrypting a database.
Abstract courtesy : Microsoft
Reference: Pinal Dave (http://blog.sqlauthority.com)