My grandfather was a cryptographer. He used to send me letters in code that I had to break before I could read them. I recently found his old notebook, plus some newsletters and info from the ACA. I’ve had his basic cryptanalysis book for years. His code name was The Squire. My favorite activity was trying to break the code of his latest letter so I could see what he said.
Prompt: Think of a favorite childhood sport, game, or activity. Make a nostalgic photo today. (@muffett68)
