I think Nintendo needs more security consultants...
Should I use HEX or ASCII when creating a key?
When entering a key, you have the choice of entering Hexadecimal or ASCII characters. Hexadecimal (HEX) is the easiest to use. You can either create a 10-digit (64-bit) or 26-digit (128-bit) key. We recommend the 10-digit. Consider using an easy-to-remember number.
So since WPA (supported on the DSi) and WPA2 are not possible, what can I do in order to have a "secure" connection to my wireless router?
I have thought about many different things, like MAC address filtering and stuff like that, but nothing that can't be hacked in less than 10 minutes... :-\
Other than only plugin my wireless router when she needs it and change the password every single time she uses it (which is quite anoying...), I can't think of anything else...