Pretty Good Security

The CompStrm Wiki is now reasonably well secured, without recourse to encription or SSL.

Avoiding SSL in particular means that its a whole lot easier for anyone to bring up their own server.

Also, having reasonably good security together with access controls will be a big value-add.

I'll note that the weakest point is registration--its just hard to communicate a password safely without encription.

Single signon is one of the neater features, and is itself well secured. The catch here is that you use the same username/password in all the Arks and that their clocks be within a few minutes of each other. (Different timezones are not a problem.)