The Transportation Security Administration (TSA) is quick to assure people that its long lines, patdowns and strict rules are necessary for travelers security. Security expert Billy Rios examined the hardware and software the TSA uses at airports. Presenting his findings at the BlackHat security conference here last week, Rios said the TSA may have purchased its hardware without any evaluation of its cybersecurity, and that fixing those problems now will likely cost taxpayers hundreds of millions of dollars.