What is InterBase SMP 2009
InterBase® SMP 2009 delivers high performance for applications with complex business logic and high concurrent user levels through its symmetric multiple processing support and multi-threaded architecture. New security and encryption features provide enhanced data protection. Fast, easy installation, a small footprint, automatic crash recovery, self-tuning, and near zero maintenance make InterBase is the ideal solution for embedded, turn-key applications. SQL 92 compliance, advanced data reliability and recovery, Unicode, numerous connectivity options, and support for Windows®, Linux, Solaris™, and Mac OS®/X makes InterBase perfect for high-powered, cost-effective business-critical server applications in small-to-medium enterprises. The highlights include:

• Column and Database Level Encryption
  InterBase now supports the use of weak (DES) or strong (AES) encryption to encrypt a database and/or individual columns in a database table.
• 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 a 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 installed on any server or end-user workstation.

For a detailed feature comparison please refer to the Feature Matrix available here