There's a good reason I suggest using 10
I know you can use 63 characters with special characters. The problem is that some Wi-Fi gear with get tripped up on some special characters and you'll be racking your brain trying to troubleshoot the problem. I also tell people 10 characters because it's sufficient and I specially tell people the work-factor involved. If I demand 63 characters then it becomes harder to manage and fewer people will use it and that's the last thing I want. What I want is to make it as easy as possible with 10 characters and forget the VPN and forget the MAC filtering and all the other junk. This is the KISS principle to get as many people to use good security as possible.
It?s pointless to play the one-up game and demand more and more of the user. There?s a tendency for security consultants to want to sound smart and the more they demand from the user the smarter they think they are. I?m going to buck that trend and tell you what you need to keep people from breaking your wireless LAN unless they?re willing to dedicate 100 years using one thousand quad core computers to break your key. If you got that much money and time and you?re dumb enough to try and brute force my 10-character WPA key, be my guest.
