InterBase 2007 Developer is a relational database management system
Editor: InterBase SMP combines performance benefits of a multi-generational architecture with peace of mind of log-based journaling and disaster recovery. Easy installation, small footprint, automatic crash recovery, self-tuning, Unicode, built-in SMP support, SQL 92 compliance, and near zero maintenance makes InterBase SMP the ideal database for embedded and business-critical small-to-medium enterprise server applications.
Database and column level encryption

InterBase now supports the use of either weak (DES) or strong (AES) encryption to encrypt a database and/or individual columns in a database table, providing ultimate security for data and communications Between servers and clients.
Over-the-Wire (OTW) network encryption

Typically, data encrypted at the database- or column-level is not encrypted during the transmission process. OTW encryption, however, allows you to do just that: encrypt data as it is communicated over a network from a client to a server. If you use OTW encryption, you must encrypt network transmissions with the same strength as was used to encrypt the database or columns. You can use weak or strong encryption, though to use strong (AES) encryption, you must obtain an optional strong encryption license, available at no additional charge.
Encryption of backup files

If you encrypt a database and/or any of its columns, you must also encrypt the backup files for that database. You decrypt the backup files during the restore process. This adds an additional Layer of Protection to your data.
InterBase SMP 2009 To-Go Edition

The new InterBase To-Go Edition is a small, portable version of the Desktop Edition. Target applications for the To-Go Edition include small devices and public kiosks, as well as Value Added Reseller (VAR) applications that were built using InterBase. Used in the To-Go edition form, InterBase does not have to be separately installed on any server or end-user workstation. you can free download InterBase 2009 Developer for Windows 9.0.2.369 now.