The only complexities to it are that additional characters are added into the resulting coded string as well as a replaceable substitution string that is generated statically before compiling. This can be changed per version (customized for various users). This is not a commercial product, only a amatuer tinkering into this field. It's very simple, but still, how many folks are honestly going to be able to break it or invest the effort/time to do so?
Please read "instruct.rtf" before using the program.
Right now, most of this stuff is on the mental drawing board. I do have a Visual Basic programme written populate a major grid of 9x9x9 with various planet types, temperature ranges and populations when habitable. The rules system for space combat may be using SIMTAC2, a system co-created by Jon S. Kowitz and David R. Lott. Click on SIMTAC2 to access their site.
Also, there is an ongoing project called "Civiliation X". It is a spin on the Civilization series originally developed by Sid Meier, but will take the theme through space exploration, colonization and empire-management. The author's plan is to have it as a MMORPG that is done via web-game server(s).
For those of you needing something to do right now, you may enjoy the MMORPG game called Starport: Galactic Empires. It is a very good, rather simple to learn game that will give you many hours of enjoyment with it's quality 2D graphics and player options.