We’re guessing that just as when a Cold War spy had his one-time pad captured, that would mean game over for the security. So if Meshtastic isn’t quite the thing for you then it’s possible ...

David E. Hoffman is a contributing editor to The Post and author of “The Billion Dollar Spy: A True Story of Cold War Espionage and Betrayal.” The “one-time pad” is a simple but secure way ...

The One Time Pad has been kicking around in some shape or form since the 1880s but it ... KGB agents in the US were quick to exploit this during the Cold War, placing small pads inside ...