Enquiries about GnuPG

[Robert J. Hansen]

> 1. the functionality of the software

It implements RFC4880.  All MUST functions, as well as the overwhelming
majority of SHOULDs (perhaps all!), are supported.

> 2. the licensing structure(s) of the software and
> associated prices for licensing

GNU GPL v3.  How much it costs depends on from whom you buy it.  You can
get it for free from many sources.

> 3. the hardware, software and other requirements for
> implementation of the software

Most UNIXes and Win32.  If it follows POSIX, GnuPG can probably be
compiled there.

> 4. the implementation procedure of the software

I don't understand the question.

> 5. The cost for the software, and any other additional
> cost(s) including support maintenance and upgrade fees.

Depends on from whom you buy it, and/or from whom you buy support.  As
mentioned above, you can get it for free from many sources.