Sean Dennis -> August Abolins said..

 SD> I don't understand the big deal about this.  You can get GPG
 SD> (for free) on Windows, so why bother with this?


SP is intended to be more than just encryption. It's designed to hide the
existence of encrypted data making it only available to the individual who
knows about it.

The GRC link describes it best.

--- Thunderbird 2.0.0.24 (Windows/20100228)