The cipher engine.
Built, not downloaded — every rotor, key and lamp made in code.
Scroll — it comes apart
then it takes your keys
Ch. 01 — anatomy
Three rotors, one secret
Each ring is a fixed substitution alphabet; each keypress steps the right rotor, carries like an odometer. 26³ starting positions, and the wiring is public — only the setting is secret.
Ch. 02 — live fire
Type — it encrypts
Your keyboard drives the machine: a key sinks, the right rotor steps, and a lamp answers with the cipher letter. Real Enigma wiring — I, II, III, reflector B.
Ch. 03 — provenance
Made, not found
No stock assets in this instrument — geometry, letter rings, keys, lamps and cables are generated at runtime. The machine is the argument.