Is someone using my wireless?

[Expeto]

Actually, there are multiple ways to stop a brute force attack about 2-3 passwords checks in (especially on wireless networks), but you know, if you can't find them on your own then it's pointless explaining them.

How can I deny such solid evidence...

[rdtphd]

u say u use wpa so they mostly likely didnt hack the password unless you have a keylogger.

If the password is weak, WPA can be cracked in relatively little time using dictionary or bruteforce attacks.

well duh if u use a common password that would be in a dictionary file. thats like setting your password = password and thinking you are secure. and back to the OP he said

I have changed it to a 12 character password using a password generator

[Gorbux]

How Can I Find Out If Someone’s Stealing My Wi-Fi?

Thats a great link