Just looking at it from a technical perspective, Pennywize, being first generation, just counts
IPs. That worked fine up until 1998, when the crackers figured out how to use Pennywize
to make it easier to crack a site.
Proxypass, the second generation, added a simple proxy detection system and a Turing Image.
That makes it significantly more effective the first generation systems like Pennywize.
In the third generation, Strongbox of course counts IPs, has two distinct proxy detection systems,
and the Turing Image, but also adds system fingerprinting, dual temporal analysis, etc.
Assuming that each system was just as well written, supported, etc., Strongbox would be
"best" from a technical perpective in that it does what Pennywize and Proxypass do, plus more.
One other big difference is that Media Player won't stream any video protected by any
system that involves the pop up gray box asking for a user name and password.
Strongbox and a couple of others use a log in screen rather than the pop up box,
so they allow Media Player to stream video.
Also you may want to compare some of the extra features. Strongbox has things like
the handoff function, the ability to use multiple password files or MySQL databases
to store passwords, ripper trapping, etc.
These GFY threads may be of interest to you:
http://www.gofuckyourself.com/showth...hreadid=344238
http://gofuckyourself.com/showthread...=1#post6579967
http://www.gofuckyourself.com/showth...id=277500.html
http://www.gofuckyourself.com/showth...id=266838.html
http://www.gofuckyourself.com/showth...id=264282.html
http://www.gofuckyourself.com/showth...hreadid=350731
http://www.gofuckyourself.com/showth...hreadid=352410
http://www.gofuckyourself.com/showth...=1#post6260911
My thanks to those who have taken the time to post about Strongbox.
If you decide to give Strongbox a try, note the after 8 years at the same price,
our first price increase will be later today. We'll be going from $100 flat to $150,
so you may want to get your order in quickly.