On the Subject of LED Encryption

Ooooh, shiny lights and buttons. Touchy touchy!

  • Two to five LEDs are installed at the top of the module, representing stages. To disarm the module, these stages must be solved in order.
  • Four buttons with four different letters are shown. The letters change at each stage.
  • The current stage is indicated by a number in the top left of the module.
  • The current stage’s multiplier is indicated by that stage’s LED according to the following table:
    Red Green Blue Yellow Purple Orange
    2 3 4 5 6 7
  • Assign each letter of the alphabet to the numbers 0–25 (A = 0, B = 1, C = 2, etc.).
  • A button is correct if its letter value, multiplied by the current stage’s multiplier, modulo 26, is equal to the value of the letter on its diagonally opposite button.
  • At each stage, press a correct button. There may be more than one possible answer.