What follows is a guest post from Nicholas Weaver, a computer security researcher at the International Computer Science Institute in Berkeley: Properly configured, an iOS device is perhaps the most secure, general purpose communication device available. The iPod Touch in particular is my preferred communication device for those who need to operate in an extremely hostile network such as China or France, and for most users, iOS is vastly more secure than Android.Despite this, "best" does not mean "impregnable". The FBI claims that iPhones are "bricks" containing no useful information and Apple claims that iMessage is "end-to-end" secure. Neither is...