One day at a beach I watched a wave crash in and saw the sand washing up in a blur. I scooped up some sand and examined it closely and it dawned on me: Close-up

One day at a beach I watched a wave crash in and saw the sand washing up in a blur. I scooped up some sand and examined it closely and it dawned on me: Close-up bitmaps of sand are a perfect source of randomness. It's easy to shuffle the sand and take another picture and by doing this repeatedly you can capture enormous random key for secure encryption. One machine does the work of composing the message and saved it onto a thumb drive. You take that out and put it into a machine that only encrypts. Then you take the cryptext onto another medium and load it into a machine that is connected to the internet and transmit. Hackers cannot reach the machine that does the work.