DigiSecret Pro and Lite

What's the difference between DigiSecret Pro and Lite?

The following features are available in the Pro version only:

Message Encryption Center that allows you to encrypt and e-mail text messages.
Ability to send and receive files via TCP/IP to/from other DigiSecret users.
Ability to customize SFX archives by adding a title and hyperlink that can execute a specified command.

All other features are exactly the same in both versions. Just like the Pro version, DigiSecret Lite can encrypt and decrypt archives, create SFX files, shred files, etc.