If someone steals your password, you can change it. But if someone steals your thumbprint, you can't get a new thumb. The failure modes are very different.
Bruce SchneierWe can't keep weapons out of prisons; we can't possibly expect to keep them out of airports.
Bruce SchneierAnyone, from the most clueless amateur to the best cryptographer, can create an algorithm that he himself can't break.
Bruce SchneierMicrosoft knows that reliable software is not cost effective. According to studies, 90% to 95% of all bugs are harmless. They're never discovered by users, and they don't affect performance. It's much cheaper to release buggy software and fix the 5% to 10% of bugs people find and complain about.
Bruce SchneierWhy is it that we all - myself included - believe these stories? Why are we so quick to assume that the TSA is a bunch of jack-booted thugs, officious and arbitrary and drunk with power? It's because everything seems so arbitrary, because there's no accountability or transparency in the DHS.
Bruce Schneier