InterBase Encryption is supported starting with InterBase 2009. InterBase enables you to encrypt information at one or both of the following levels:
Database Level Encryption (InterBase encrypts all of the database pages that contain user information).
Column Level Encryption (Column-level encryption is more flexible and specific).
Using InterBase Database Encryption you can also encrypt Database Backup Files. For more information about encrypting your data with InterBase, see Data Definition Guide.
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Ricardo Boaro 