Or by printing it in a book. There's LOTS of reluctance to ban actual, physical books in the US (and plenty of reasons that any ban would be struck down). That

Or by printing it in a book. There's LOTS of reluctance to ban actual, physical books in the US (and plenty of reasons that any ban would be struck down). That said, up to the mid 90s it was theoretically against the law to show a foreign national a printed-out copy of DES. Crazy. I think it was published in magazines . . .