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ASK HN: Most secure way to send a message from one place to another on earth

by neelkadia on 10/13/17, 6:04 AM with 4 comments

• by airbreather on 10/13/17, 6:28 AM

  Pre-arranged codes/signals where the signal contains none of the message.

  e.g. selling a certain item/s at a certain price on ebay means a pre-agreed action is to occur, to be simplistic.

  This does however require collusion prior.

• by wowtip on 10/13/17, 6:52 AM

  I think you need to set the scope better for the question. Easily usable by average Joe? Most secure using available for all technology / infrastructure?

• by anigbrowl on 10/13/17, 6:11 AM

  Simple way: Signal messaging

  Elaborate: one time pads, lasers bounced off lunar reflectors