Deep in the archives of the Vatican library, a mysterious hand-written book, scrawled with strange symbols, had lain unread for more than 400 years. Its cryptic pages apparently concealed secret remedies "for affections of the human body", according to some text scratched inside the cover. Such healing practices were kept under wraps at the time since they could attract suspicion or even accusations of witchcraft.Known as the Borg cipher, the 408-page-long manuscript is mostly incomprehensible -- coded using 34 obscure symbols with a few Roman letters and a front page written in Arabic. There was no known key to reveal...