If a cracker is serious in gaining access to your bandwidth and details they will, there's nothing in the current market that can protect against that especially for wireless. Some of the measures above will help deter most, but unfortunately even script-kiddies* can get around those. Just be wary, i doubt that anyone could be arsed to do it to be honest *script-kiddies = people who know F-all about hacking cracking but preted they do and use scripts (they dont even understand) written by reall hackers to do the job for them.