As The World Burns, At least You’ll Have Secure Messaging
1 min read
Summary
A LoRa communicator that delivers secure messaging using a one-time pad approach to encryption has been created by Hackaday contributor Bertrand Selva, that uses a Pi Pico.
The device features a 3D-printed case with a colour screen and USB-A port for a keyboard, with each terminal in the network having a copy of the SD card storing the list of keys, which are time-specific to GPS derived time.
Old keys are destroyed, but the Hackaday community is curious as to how the keys are generated, and how the system could survive the loss of an SD card.
Selva reveals that it uses a 433 MHz LoRa module, which differs from the preference of radio frequency enthusiasts in other countries.
